Winner ventured, having bravery (5)
I believe the answer is:
nerve
'bravery' is the definition.
(nerve is a kind of bravery)
'winner ventured having' is the wordplay.
'having' says the answer is hidden in the clue.
'NERVE' is hidden in the letters of 'winner ventured'.
(Other definitions for nerve that I've seen before include "Bodily fibre carrying sensation" , "Coolness under fire" , "Sensor for pain etc" , "Temerity" , "Bodily fibre that transmits sensations" .)