European staff had to come out (7)
I believe the answer is:
emanate
'come out' is the definition.
(I've seen this before)
'european staff had' is the wordplay.
'european' becomes 'E' (abbreviation e.g. EU).
'staff' becomes 'man' (as in staffing or manning a particular place).
'had' becomes 'ate' (e.g. I had an ice cream).
'e'+'man'+'ate'='EMANATE'
'to' is the link.
(Other definitions for emanate that I've seen before include "spring" , "Issue or originate from manatee" , "Rise" , "Come forth" , "Proceed or issue forth" .)