Across
Party about to get immersed in long-winded study of linguistic elements (7)
I haven't cracked this one yet — but Fifteensquared have:
DO="Party" reversed/"about", "immersed" inside PROSY=dull or tedious="long-winded"
Sailors about to join Eastern ship that contains unhealthy liquid (7)
I haven't cracked this one yet — but Fifteensquared have:
definition: an abscess would contain pus ABS (AB is a sailor, with an S to make it plural); C (Circa, "about"); E (Eastern); SS (steam ship)
Character providing reheated food (4)
Scientist producing exceptionally fine earth, hard to begin with (10)
I haven't cracked this one yet — but Fifteensquared have:
definition: the physicist Daniel Gabriel Farenheit [wiki] anagram/"exceptionally" of (fine earth h-[ard])*
Victim, say, sent back to be placed on seat interminably (6)
I haven't cracked this one yet — but Fifteensquared have:
EG=e.g.=for example="say" reversed/"sent back" and placed after STOO-[L]="seat" without its ending i.e. interminably
Part of body with short line following knock (8)
What ambitious employee seeks, against standing still (9)
17a
Natural wonder getting all fans excited, set inside (5,5)
See 16
Divine quality came in men surprisingly (9)
I haven't cracked this one yet — but Fifteensquared have:
definition: the quality of being present [in the context of a God, being present in and throughout the universe] anagram/"surprisingly" of (came in men)*
Some stuff – older/oldest nonsense (8)
End of ordeal with one extremely irritable (6)
I haven't cracked this one yet — but Fifteensquared have:
definition: to be liverish or livery can mean "irritable", or suffering from a disordered liver end letter of [ordea]-L plus I="one" plus VERY="extremely"
Hurry into church alongside saints, showing purity (10)
I haven't cracked this one yet — but Fifteensquared have:
HASTEN="Hurry" inside CE (Church of England); alongside SS (abbreviation for "saints")
Country’s capital no longer losing heart (4)
Attractive person in two American TV series, second coming first (7)
I haven't cracked this one yet — but Fifteensquared have:
definition: a slang term for someone with great charm M*A*S*H [wiki] and ER [wiki] are "two American TV series", with S (second, unit of time) going in front
Bet wife with time will get angry-looking? (7)
Down
Roll containing a piece of hot food? (7)
I haven't cracked this one yet — but Fifteensquared have:
ROSTER="Roll" (a list of names, e.g. 'roll call'), around A (taken from surface)
Brief while after school for dunce (5)
Most skilful match with excellent opener (7)
Fish in lake caught by boy shortly (6)
I haven't cracked this one yet — but Fifteensquared have:
definition: a fish of the genus Blennius L (lake) caught inside BENNY=short for a boy's name e.g. Benjamin
Firm in this place no longer with leader gone? That shows intelligibility (9)
Green fodder and fuel stored by wise person (7)
English town group embracing trendy fashion on promenade? (7,6)
I haven't cracked this one yet — but Fifteensquared have:
SET="group", around all of: HEP (old fashioned way to say 'hip' or "trendy") plus TON ("fashion", from French usage as in e.g. 'bon ton') plus MALL="promenade"
The writer introducing fifty poets and singers (9)
I haven't cracked this one yet — but Fifteensquared have:
ME (from the point of view of "The writer" of this clue); plus L ("fifty" in Roman numerals): plus ODISTS=writers of odes="poets"
Line in article penned by a Brit (7)
I haven't cracked this one yet — but Fifteensquared have:
definition: a term for a certain kind of line in geometry THE (definite "article"); penned inside A POM=Australian term for "a Brit"
Problem with organ in a small place above huge space (7)
I haven't cracked this one yet — but Fifteensquared have:
definition: the imperfect development or absence of a body part or organ A (from surface) plus PL (small/abbreviated version of "place") plus ASIA="huge space"
Old mode of transport? I look up, beset by worry (7)
I haven't cracked this one yet — but Fifteensquared have:
definition: aa type of horse-drawn carriage I (from surface), plus LO=exclamation/instruction to "look" reversed/"up"; all inside (beset by) CARE="worry"
Something for making building blocks – it’s not hard to do (6)
Think highly of university restricted by depression (5)
Type letters or click words in the clue