Section of good chaps getting put outside (7)
I believe the answer is:
segment
'section' is the definition.
('segment' can be a synonym of 'section')
'good chaps getting put outside' is the wordplay.
'good' becomes 'g' (abbreviation).
'chaps' becomes 'men' (I've seen this before).
'getting' means one lot of letters go next to another.
'put' becomes 'set' (setting is a kind of putting**).
'outside' is an insertion indicator.
'g'+'men'='gmen'
'gmen' placed into 'set' is 'SEGMENT'.
'of' acts as a link.
(Other definitions for segment that I've seen before include "Section of a circle" , "Part separable from other parts, say of orange" , "(Divided-up) part" , "One of several parts of a whole" , "One part of a whole" .)