Say warning, cross enough (3,7)
I believe the answer is:
for example
'say' is the definition.
(I've seen this in another clue)
'warning cross enough' is the wordplay.
'warning' becomes 'fore' (shouted in golf).
'cross' becomes 'x' (an X is a cross).
'enough' becomes 'ample' (ample means enough or plenty).
'fore'+'x'+'ample'='FOR EXAMPLE'
(Other definitions for for example that I've seen before include "By way of illustration" , "Speed" , "Say" .)