Fish and wine bottles in for music player (4,8)
I believe the answer is:
bass clarinet
'for music player' is the definition.
'fish and wine bottles' is the wordplay.
'fish' becomes 'bass' (bass is a kind of fish).
'and' is a charade indicator (letters next to each other).
'wine bottles' becomes 'clarinet' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'bass'+'clarinet'='BASS CLARINET'
'in' is the link.
Can you help me to learn more?
(Other definitions for bass clarinet that I've seen before include "instrument" , "that can make musical sounds" .)