European to rush around part of UK (6)
I believe the answer is:
danish
'european' is the definition.
(from Denmark)
'rush around part of uk' is the wordplay.
'rush' becomes 'dash' (dashing is a kind of rushing).
'around' means one lot of letters goes inside another.
'part of uk' becomes 'NI' (Northern Ireland).
'dash' placed around 'ni' is 'DANISH'.
'to' acts as a link.
(Other definitions for danish that I've seen before include "Flat cake - and party's his! (anag)" , "Language of Denmark" , "Scandanavian, pastry perhaps" , "Dash in to the mysterious nationality" , "Type of pastry cake" .)