Dress right for man (6)
I believe the answer is:
robert
'man' is the definition.
'dress right' is the wordplay.
'dress' becomes 'robe' (robing is a kind of dressing).
'right' becomes 'rt' (abbreviation as in Rt Hon- the Right Honourable).
'robe'+'rt'='ROBERT'
'for' is the link.
(Other definitions for robert that I've seen before include "Founder of London's police force" , "-- Browning, English poet" , "-- the Bruce" , "Boy" , "---17 ac. 23, explorer" .)