Superstar provides heavenly bread stuffed with delicious olive tips (7)
I believe the answer is:
madonna
'superstar' is the definition.
(Madonna the pop star)
'heavenly bread stuffed with delicious olive tips' is the wordplay.
'heavenly bread' becomes 'manna' (as in manna from heaven).
'stuffed with' means one lot of letters goes inside another (some letters get stuffed inside).
'tips' says to take the initial letters (tip can refer to the top end of something).
The first letters of 'delicious olive' is 'do'.
'manna' placed around 'do' is 'MADONNA'.
'provides' is the link.
(Other definitions for madonna that I've seen before include "Like a Virgin singer" , "Picture or statue of the Virgin Mary" , "Religious art subject - pop singer, b. 1958" , "pop star" , "Religious work" .)