Across
Seducer reluctant to have a port (8)
A bishop caught with horse outside church office (6)
Cameroon is in her travels, whatever the circumstances (4,4,2,5)
Stop supporting a group with no backing (7)
Name a French poet's sister's calling (7)
Where a flyer may go for a walk in London (8)
American industrial leader, old and pale of face (5)
Additional passage from book court rejected (5)
A right pain around Ealing at first, like the bloody Tube! (8)
I haven't cracked this one yet — but Times for the Times have:
A + R + T(E[aling])RIAL. Another one I biffed.
Trailblazer on expedition initially requiring external support? (7)
I haven't cracked this one yet — but Times for the Times have:
PI(ON E[xpedition])ER.
Famous actor originally involved in musical (7)
I haven't cracked this one yet — but Times for the Times have:
OLIV(I[nvolved]ER, a bit of a chestnut.
Most of rite mother used to somehow endure to the end (4,3,3,5)
Tin containing damsons primarily in very small country (6)
I haven't cracked this one yet — but Times for the Times have:
S(WE(D[amsons]E)N, where SN is the chemical symbol for tin.
Tear about always, being vicar, perhaps (8)
Down
Small expanse of water Belloc handled, partly (6)
Male keyboard player releasing current for one in kitchen (9)
I haven't cracked this one yet — but Times for the Times have:
TIM + P[i]ANIST.
A brother helped, we're told (scraped away!) (7)
Rise of number one team, one bound to be permanently revolutionary (5)
I haven't cracked this one yet — but Times for the Times have:
NO I + XI, all upside-down.
Graduate nurse once, one keeping judge's dog (7)
I haven't cracked this one yet — but Times for the Times have:
BA + SEN + J + I.
Friend has a turn crossing major road (5)
I haven't cracked this one yet — but Times for the Times have:
A (M1) GO.
Surrendering crop in conclusion of farming (8)
I haven't cracked this one yet — but Times for the Times have:
YIELD + IN + [farmin]G.
Gloomy signal from one who knows the score? (8)
Fervour of Republican entering in civic style? (8)
I haven't cracked this one yet — but Times for the Times have:
A LA C(R)ITY. This clue probably would have been better with something like urban style.
Females endlessly grabbing attention is fatiguing (9)
This chap is a Pacific country's star (8)
I haven't cracked this one yet — but Times for the Times have:
HE’S + PER + U.S. HE’S PERU’S. This shows the hazard of being a Mephisto solver, and automatically substituting PER for A.
A sign erected over Tyneside plant (7)
Put out again about subject under discussion (7)
Hospital preparation military engineers paid to go without (6)
I haven't cracked this one yet — but Times for the Times have:
P(R.E.M.E)D, a word that has a different meaning in the US. Come to think of it, we don’t have the Royal Electrical and Mechanical Engineers either.
Senior citizen flaying member of fighting force (5)
Pigment made from mineral aggregate surrounding church (5)
Type letters or click words in the clue