What a stinker this is! Unfamiliar words with tricksy constructions (16a for instance), dubious anagram indicators (18a), baffling parsing (3d - if I'm right, that is!), apparent errors in cryptic grammar (14d), and ambiguous answers (15a).
Now to the point. The SW is currently more or less empty; I'll have another look in a bit. However I'm completely stuck on 1d
Painter from Verona, it's temperature controlled (9)
?E?T?I?N?
(The N might be E - see 15a above!)
Any hints?