Share expenses equally (2,5)
I believe the answer is:
go dutch
'share expenses equally' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for go dutch that I've seen before include "settle equitably" , "to pay only half" , "Share costs equally" , "Pay for your own meal - in Holland?" , "Pay your own share of bill in Holland?" .)