Incentive a man rejected (7)
I believe the answer is:
spurned
'rejected' is the definition.
('spurn' can be a synonym of 'reject')
'incentive a man' is the wordplay.
'incentive' becomes 'spur' (spur can mean an incentive or stimulus).
'a man' becomes 'ned' (man's name).
'spur'+'ned'='SPURNED'
(Other definitions for spurned that I've seen before include "Rejected scornfully, say a suitor" , "treated with contempt?" .)