Abused slob playing instrument (6,4)
I believe the answer is:
double bass
'instrument' is the definition.
(double bass is a kind of instrument)
'abused slob playing' is the wordplay.
'playing' indicates anagramming the letters.
'abused'+'slob'='abusedslob'
'abusedslob' anagrammed gives 'DOUBLE-BASS'.
(Other definitions for double bass that I've seen before include "Stringed instrument" , "Musical instrument" , "One taking a bow" , "Low-pitched string instrument" , "... as part of orchestra" .)