Dandy guy (3)
I believe the answer is:
fop
'dandy guy' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for fop that I've seen before include "A dandy like Beau Brummel" , "exquisite" , "fashionable type" , "Affected dandy" , "Gallant" .)