Leave some Europeans to share expenses (2,5)
I believe the answer is:
go dutch
'share expenses' is the definition.
(I've seen this before)
'leave some europeans' is the wordplay.
'leave' becomes 'go' (to go is to depart or leave).
'some europeans' becomes 'dutch' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'go'+'dutch'='GO DUTCH'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for go dutch that I've seen before include "come to a fifty-fifty financial arrangement" , "Pay your own share of bill in Holland?" , "share cost" , "Pay for your own meal - in Holland?" , "Share expenses equally" .)