Coffee from Kilmacolm? Och aye! (5)
I believe the answer is:
mocha
'coffee' is the definition.
(I know that mocha is a type of coffee)
'from kilmacolm? och aye' is the wordplay.
'from' says the answer is hidden in the clue.
'MOCHA' is hidden within 'kilmacolm och aye'.
(Other definitions for mocha that I've seen before include "Arabian coffee" , "It may end up as grounds" , "Fine quality coffee" , "Kind of coffee" , "Dark brown" .)