Something blown in neo-bourgeoisie returning (4)
I believe the answer is:
oboe
'something blown' is the definition.
(oboe is a kind of wind instrument)
'in neo-bourgeoisie returning' is the wordplay.
'in' indicates a hidden word.
'returning' says the letters should be written in reverse.
'eobo' is hidden within 'neo bourgeoisie'.
'eobo' written backwards gives 'OBOE'.
(Other definitions for oboe that I've seen before include "Slender double-reed instrument" , "Reed instrument" , "it's blown" , "Orchestral instrument" , "Instrument used in 1d" .)