Steady guy (4)
I believe the answer is:
beau
'steady guy' 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 "Male lover of a girl or young woman" , "Dandy - boyfriend" , "Fop; lover" , "An old-fashioned boy friend like Brummell" , "French boyfriend" .)