Is able to reproduce appetiser (6)
I believe the answer is:
canape
'appetiser' is the definition.
(I've seen this before)
'is able to reproduce' is the wordplay.
'is able to' becomes 'can' (I've seen this before).
'reproduce' becomes 'ape' (I can't justify this - if you can you should believe this answer much more).
'can'+'ape'='CANAPE'
Can you help me to learn more?
(Other definitions for canape that I've seen before include "Savoury mouthful" , "Small savoury item" , "cocktail treat" , "Small savoury on toast or bread" , "Item of party food" .)