Beer feeding explosive ability (6)
I believe the answer is:
talent
'ability' is the definition.
(a talent is an ability)
'beer feeding explosive' is the wordplay.
'beer' becomes 'ale' (type of beer).
'feeding' is an insertion indicator (one word is fed by another set of letters).
'explosive' becomes 'tnt' (TNT is an example).
'ale' put within 'tnt' is 'TALENT'.
(Other definitions for talent that I've seen before include "able people" , "Coin at one time" , "Natural aptitude of an old coin" , "Unit of currency" , "Natural endowment" .)