Band member grabbed drink (5,4)
I believe the answer is:
snare drum
'band member' is the definition.
(someone playing a snare drum)
'grabbed drink' is the wordplay.
'grabbed' becomes 'snared' (I've seen this in another clue).
'drink' becomes 'rum' (rum is a kind of drink).
'snared'+'rum'='SNARE-DRUM'
(Other definitions for snare drum that I've seen before include "One may produce a rattling sound" , "Percussion instrument" , "instrument in kitchen" , "nine [RUFF] could come from this" , "instrument for beating" .)