Have the courage (4)
I believe the answer is:
dare
'have the courage' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for dare that I've seen before include "Have the courage to try something" , "Challenge, defy, face" , "Be bold enough (to)" , "Risk; challenge" , "Dan - - , 'Eagle' pilot" .)