Steady fellow (4)
I believe the answer is:
beau
'steady fellow' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for beau that I've seen before include "An old-fashioned boy friend (4)" , "An old-fashioned boy friend like Brummell" , "Fop; lover" , "Beloved" , "Dandy - attentive companion" .)