Across
Giddy, similar having struck head (6)
I haven't cracked this one yet — but Fifteensquared have:
the first letter ("head") removed/"struck" from [r]-ELATED="similar"
Serious film about a double Dutch lover? (8)
I haven't cracked this one yet — but Fifteensquared have:
for definition, "Dutch" is rhyming slang: 'Duchess of Fife' => 'wife' BIG="Serious" + MIST=thin layer="film"; around "a" [taken from surface]
One Direction’s corrosive agent on the radio? (8)
Girl, cross with deadline, finally gets extension (6)
I haven't cracked this one yet — but Fifteensquared have:
ANNE="Girl" + X="cross" + final letter of [deadlin]-E
Garbage in tum, husband – one of those? (5,7)
I haven't cracked this one yet — but Fifteensquared have:
definition: someone who overeats, and might therefore have garbage in their tum anagram/"Garbage" of (in tum husband)*
Somewhere for swimming cap, one’s head! (4)
I haven't cracked this one yet — but Fifteensquared have:
LID="cap" + head / first letter of O-[ne]
Virtue in large settlement, hurrying to bank when last one divorced! (8)
Stumble across wrong wire in security device (8)
I haven't cracked this one yet — but Fifteensquared have:
FALL="Stumble" around anagram/"wrong" of (wire)*
Bloomer in cunning manner initially erased (4)
I haven't cracked this one yet — but Fifteensquared have:
[s]-LILY=in a sly way="in cunning manner", with its first/initial letter erased
Is that concealed by instrumental entertainer? (6,6)
Not appreciated – as a number made redundant? (6)
I haven't cracked this one yet — but Fifteensquared have:
a musical "number" made redundant might be left UNSUNG
Turkey probed by animal doctor, alas, some leave (5,3)
I haven't cracked this one yet — but Fifteensquared have:
in definition, "leave" as in time off work DUD="Turkey", with VET="animal doctor" probing inside; plus AY="alas"
Reassembly of gun, doable after unloading a weapon (8)
I haven't cracked this one yet — but Fifteensquared have:
anagram/"Reassembly" of (gun doable)*, removing/unloading the "a"
Before year, second went fast (6)
Down
Best lap (4)
Body part raised, black in colour (9)
I haven't cracked this one yet — but Fifteensquared have:
HIGH="raised" + B ("black"); in TONE="colour"
Romantic novel read well! (6)
Where plants studied in old forest on which log cabin built, housing much appreciated (9,6)
I haven't cracked this one yet — but Fifteensquared have:
ARDEN="old forest" [wiki] ; with anagram/"built" of (log cabin)* going "on" top, with TA=thank you="much appreciated" housed inside
Powdery on the moon, scrap’s gathered up (8)
I haven't cracked this one yet — but Fifteensquared have:
LUNAR="on the moon" gathered inside RAG="scrap"; all reversed/"up"
He painted Earthling and Venutian, say (5)
The other pieces for old band (3,7)
Local call outlining prophecy (10)
22d
I don’t want to listen – but a labourer might? (4,2,3,4)
A generic kind of philanthropist or self-help guru (8)
I haven't cracked this one yet — but Fifteensquared have:
definition(s): Andrew Carnegie the philanthropist or Dale Carnegie the self-help guru who wrote How to Win Friends and Influence People anagram/"kind of" of (A generic)*
Legend written below canopy of pine, part of trunk (6)
I haven't cracked this one yet — but Fifteensquared have:
in definition, "trunk" referring to a person's body ELVIS="Legend" under the top/canopy of P-[ine]
Doctor you and I had, healer (5)
I haven't cracked this one yet — but Fifteensquared have:
DR (Doctor) + U="you" + I'D=contraction of "I had"
See 15
Type letters or click words in the clue