Make coffee an extra benefit (4)
I believe the answer is:
perk
This clue is a double definition.
'make coffee' is the first definition.
(short for percolate)
'an extra benefit' is the second definition.
(Other definitions for perk that I've seen before include "Company car, for example" , "Employee's benefit as an entitlement of job" , "extra privilege" , "Incidental benefit from one's employment" , "Fringe benefit" .)