Heroic feat (7)
I believe the answer is:
exploit
'heroic feat' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for exploit that I've seen before include "Take full advantage of escapades?" , "Valiant deed; take advantage of" , "The deed to make gain from" , "Feat; make use of" , "Feat, accomplishment" .)