Abandon attempt after warning cry (6)
I believe the answer is:
forego
'abandon' is the definition.
(I know that forego is a more specific form of the action abandon)
'attempt after warning cry' is the wordplay.
'attempt' becomes 'go' (go is a kind of attempt).
'after' is a charade indicator (letters next to each other).
'warning cry' becomes 'fore' (I've seen this in another clue).
'go' after 'fore' is 'FOREGO'.
(Other definitions for forego that I've seen before include "Go without (desirable thing)" , "Take precedence" , "Go without, give up" , "Manage without" , "Relinquish - do without" .)