Sal breaks pill to provide condiment (5,4)
I believe the answer is:
table salt
'condiment' is the definition.
(I've seen this before)
'sal breaks pill' is the wordplay.
'breaks' indicates putting letters inside.
'pill' becomes 'tablet' ('tablet' can be a synonym of 'pill').
'sal' placed inside 'tablet' is 'TABLE SALT'.
'to provide' acts as a link.
(Other definitions for table salt that I've seen before include "Condiment" , "contents of cellar" , "Seasoning for meal" , "It adds zest to meals" , "item on board" .)