Across
Smack on behind produces lingering sensation (10)
Found plough removed from Parisian fortress (4)
I haven't cracked this one yet — but Times for the Times have:
BASTILLE loses TILL (plough). I can see found = base as in “it was founded on / based on…”
Gentle exercise taken with a climber (5,3)
Butcher's chestnut horse should be returned (6)
I haven't cracked this one yet — but Times for the Times have:
Reverse of RED NAG. Butcher’s (hook) CRS for look = gander.
Pot for reheated meat and vegetables (4)
With villain seen at Parliament, shelter on bridge (10)
Hanging about in short undies no good (9)
Landmark seen in Australian port after docking (5)
I haven't cracked this one yet — but Times for the Times have:
CAIRN(S). Port in north-east of Australia. Worth a visit, maybe, on the way to dive the GB Reef.
River taking sulphur to Sumerian city-state (5)
Miserable chap tucking into toast (9)
Corner at 90 — that needs precise approach (5,5)
I haven't cracked this one yet — but Times for the Times have:
well, you’d need to come in at the right angle, for a precise approach.
Lout beginning to cause mayhem when officer leaves (4)
One suit makes a Scottish outfit (6)
I haven't cracked this one yet — but Times for the Times have:
Reference to the Edinburgh football team Heart of Midlothian FC, usually known as Hearts.
Plant key behind reptile house (8)
Viewer's sore as regularly sat by set? (4)
I haven't cracked this one yet — but Times for the Times have:
Alternate letters of S a T b Y s E t.
Dismal expression to consume small one being humbled (6,4)
I haven't cracked this one yet — but Times for the Times have:
A LONG FACE being a dismal expression, insert S(mall) and I.
Down
Hard to crack clues say rewritten for tragic author (9)
Agent's ultimate motivation is betrayal (7)
Parasite in record dispute over millions (8)
Wind through blades creates unseen danger (5,2,3,5)
Becomes hard to follow case of European political theorist (6)
I haven't cracked this one yet — but Times for the Times have:
E..N (case of EuropeaN) GELS (becomes hard).
Swine upset everyone after scrap where house calls made (5,4)
Poet having to write in ship on turning turtle (7)
I haven't cracked this one yet — but Times for the Times have:
PEN (write) inside reversed RE (on) SS (ship). My FOI, just because it was the first clue I happened to read.
Lovelorn cowboy on lake shows tactless behaviour (9)
I haven't cracked this one yet — but Times for the Times have:
GAUCHO our cowboy, loses O (lovelorn), on Lake Erie.
Kingmaker needs tree for English country home (9)
I haven't cracked this one yet — but Times for the Times have:
you could write this in from the definition, if you spotted that; to parse it you have to know that Richard Neville, 16th Earl of Warwick, was so known, as during the Wars of the Roses he had a big hand in restoring Edward IV and then Henry VI to be King. Then you replace the E in NEVILLE with ASH for tree. And know that Nashville is the home of country music, of course.
Play safe with hammer (5,3)
Move across to pack explosive in missile system (7)
Greek character embraced by female creature (7)
One held in contempt to stop call for decoration (6)
Type letters or click words in the clue