Across
Cheapo larch houses extremely cold (5)
English old gold coin one has for giving a lesson (9)
Block A, location of Paul's dramatic transformation (9)
Limits of expansion in dull material (5)
Observe drinks holding temperature with sun (7)
Head of the hospital department, Margaret, is a help in securing temporary accommodation (4,3)
One sat out after taking top from pot noodle? (5)
28d
What cows do with Mark is not nice (3,4)
Drug to be taken after meals — bother! (5)
Holding back name for male leads to cursing (7)
Rave organised by North American port stuck in routine (3,4)
Lawyers next to God, here in Scotland! (5)
Get touchy again, bringing rook into centre play (9)
Skill in wangling ten spades? (9)
Time to cuddle up to current bedtime companion (5)
Down
Small sweet tuber (4)
Climber's cleat is abandoned around mountain top (8)
Mars is missing hydrogen supplies (4)
Poetry virtually set in concrete — a change for the worse (8)
Brooke, rugby union forward? (6)
Hot air added to temperature above station (10)
Snatch some sleep after Josh (6)
In short, 'ermine' is an expression (4)
Did sponge with fancy pie and date? (5)
Man in Texas making testers (10)
Really important to get on someone's nerves on air (5)
About to break two arms badly, making a heap of soil (4,4)
They produce flavouring aids, seen in a different light (8)
24d
Formation of timeless dark matter, eg on new area of productive land (6,6)
See 23
Support end of pipe in watering-hole (4)
See 18
Tolstoy's lost, wilfully abandoned plays (4)
Type letters or click words in the clue