Sauce is good on everything (4)
I believe the answer is:
gall
'sauce' is the definition.
(thesaurus)
'good on everything' is the wordplay.
'good' becomes 'g' (abbreviation).
'on' means one lot of letters go next to another.
'everything' becomes 'all' (I've seen this before).
'g'+'all'='GALL'
'is' is the link.
(Other definitions for gall that I've seen before include "Ill-will - bile" , "Impudence, cheek" , "A sore spot or a bodily bladder" , "Irritate - presumption" , "Impertinence" .)