Crew making joke about name (4)
I believe the answer is:
gang
'crew' is the definition.
('gang' can be a synonym of 'crew')
'joke about name' is the wordplay.
'joke' becomes 'gag' ('gag' can be a synonym of 'joke'**).
'about' is an insertion indicator.
'name' becomes 'n' (common abbreviation e.g. on forms).
'gag' enclosing 'n' is 'GANG'.
'making' acts as a link.
(Other definitions for gang that I've seen before include "Organised group of labourers" , "go to Scotland" , "Organised group of workmen" , "Criminal association" , "Criminal bunch" .)