Looking bright and a wee bit gentlemanly in a suit! (6)
I believe the answer is:
sunlit
'looking bright and a wee bit' is the definition.
I can't judge whether this defines the answer.
'gentlemanly in a suit' is the wordplay.
'gentlemanly' becomes 'nl' (I can't explain this - if you can you should believe this answer much more).
'in' is an insertion indicator.
'nl' placed within 'suit' is 'SUNLIT'.
Can you help me to learn more?
(Other definitions for sunlit that I've seen before include "Unclouded" , "Insult (anag.)" , "Hit by solar rays" , "Brightly illuminated" , "Illuminated from 93,000,000 miles away" .)