Salt and wine I spilt in middle (9)
I believe the answer is:
waistline
'middle' is the definition.
(synonyms)
'salt and wine i spilt' is the wordplay.
'and' is a charade indicator (letters next to each other).
'spilt' indicates an anagram.
'wine'+'i'='winei'
'salt' after 'winei' is 'wineisalt'.
'wineisalt' anagrammed gives 'WAISTLINE'.
'in' acts as a link.
(Other definitions for waistline that I've seen before include "It goes round trunk" , "Girth" , "measurement" , "Swine tail (anag.)" .)