Quiet beer drained (4)
I believe the answer is:
pale
'drained' is the definition.
(thesaurus)
'quiet beer' is the wordplay.
'quiet' becomes 'p' (music symbol for 'piano', ie soft or quiet).
'beer' becomes 'ale' (type of beer).
'p'+'ale'='PALE'
(Other definitions for pale that I've seen before include "Dim - wan" , "Lightly coloured" , "heraldic stripe" , "Stake, lacking colour" , "Very light coloured" .)