Impression that vinegar is off, and no good (9)
I believe the answer is:
engraving
'impression' is the definition.
(thesaurus)
'vinegar is off and no good' is the wordplay.
'is off' indicates an anagram.
'and' says to put letters next to each other.
'no' becomes 'n' (common abbreviation).
'good' becomes 'g' (abbreviation).
'vinegar' anagrammed gives 'engravi'.
'engravi'+'n'+'g'='ENGRAVING'
'that' acts as a link.
(Other definitions for engraving that I've seen before include "the funeral ceremony?" , "art" , "Carving on hard surface" , "Print" , "artwork" .)