Yoohoo, ixion, peterm et al! I finished this yesterday but still don't quite get the word play in three of the clues.
31A: Component of visual purple you'll need because of following other people's (5)
because of=IN?
35A: Scotsman's drunk an aperitif (not the last) in e.g. Paris (10)
I have APER and NO in CITY but don't see where NO comes from.
27D: Learner works without a desk-top support (5)
The answer's obvious, but what's the word for learner that works without an A?