Warning shot leads to surrender (6)
I believe the answer is:
forego
'surrender' is the definition.
(I've seen this before)
'warning shot' is the wordplay.
'warning' becomes 'fore' (shouted in golf).
'shot' becomes 'go' (both can mean an attempt).
'fore'+'go'='FOREGO'
'leads to' acts as a link.
(Other definitions for forego that I've seen before include "Take precedence" , "Go without (desirable thing)" , "Get ahead" , "Precede (in place/time)" , "Go without or precede" .)