The flavour from the barrel is horrible (6)
I believe the answer is:
relish
'the flavour' is the definition.
(synonyms)
'from the barrel is horrible' is the wordplay.
'from' says the answer is hidden in the clue.
'RELISH' is hidden in the letters of 'the barrel is horrible'.
(Other definitions for relish that I've seen before include "Savour; an appetiser" , "sauce required?" , "love" , "appreciate" , "Salsa-like sauce" .)