Role for a gentleman (4)

I believe the answer is:

part

I'm a little stuck... Click here to teach me more about this clue!

'role' is the definition.
('part' can be a synonym of 'role')

I cannot understand how the rest of the clue works.

(Other definitions for part that I've seen before include "Divide; role" , "Component; divide" , "Piece, segment" , "character on > stage" , "goodbye" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app