Across
Fairly inflexible suits sent back by swimmer (8)
Defeat extremists in erroneous 20 (6)
Delight in meadows with neat fencing (8)
Experienced hand for one turning into red dwarf? (6)
4 released rattlesnake skin (5)
New stunted generation of NZ flora (5,4)
Busy bee, essentially following Law 4 (6)
Keeping rat goes badly (7)
Having recovered from illness, that's 4! (4,3)
Johns possibly arranged singly (6)
Tale with twist near the end does possibly describe warship (9)
Reserve normal in the south-east (5)
Release the French promote (3,3)
Preparing to study one in Scots government (8)
Maybe Harry's adopted 20? (6)
Providing flexible gas loans (2,4,2)
Down
Drink dispenser wrong to put hot soup in (6)
The same citadel in trouble (9)
Film director one of Britain's old 20 (5)
20d
(and 20 Down) Criminal Wagner remains out of prison (11)
40 naked prostitutes, which is anything but 4 (9)
Row about German cat (5)
Doctor 4, maybe very Catholic before start of Reformation (8)
4 20 goes off course (4)
Wheel lining beer tun in development (5,4)
Arousing orphan heard having sex (9)
Violins initially tuned well for loud little spins (8)
See 4 Down
Doctor 4's stones (7)
Considers 20, say (6)
Type of sauce possibly covering toasted asparagus starters (5)
Boring dweeb 4 when turned over (5)
Type letters or click words in the clue