Call at the coffee centre for a contribution (8)
I believe the answer is:
offering
'a contribution' is the definition.
(offering is a kind of contribution)
'call at the coffee centre' is the wordplay.
'call' becomes 'ring' ('ring' can be a synonym of 'call'**).
'at' means one lot of letters go next to another (I've seen this in other clues).
'centre' means to look at the middle letters.
The middle letters of 'coffee' are 'offe'.
'ring' put after 'offe' is 'OFFERING'.
'for' acts as a link.
(Other definitions for offering that I've seen before include "Sacrifice to deity" , "Tendering - sacrifice" , "Oblation" , "Contribution, sacrifice" , "Presenting for acceptance or rejection" .)