Woodwind instrument popular in Bordeaux (8)
I believe the answer is:
clarinet
'woodwind instrument' is the definition.
(clarinet is a kind of woodwind instrument)
'popular in bordeaux' is the wordplay.
'popular' becomes 'in'.
'in' is an insertion indicator.
'bordeaux' becomes 'claret' (I've seen this before).
'in' inserted within 'claret' is 'CLARINET'.
(Other definitions for clarinet that I've seen before include "Music maker" , "Woodwind instrument played by Artie Shaw and Benny Goodman" , "Blow that!" , "Wind instrument made from Clare tin" , "Single-reed straight-tubed instrument" .)