European, and much distressed about Brexit ultimately (8)
I believe the answer is:
dutchman
'european' is the definition.
(Dutchman is an example)
'and much distressed about brexit ultimately' is the wordplay.
'distressed' indicates an anagram.
'about' is an insertion indicator.
'ultimately' says to take the final letters.
The last letter of 'brexit' is 't'.
'and'+'much'='andmuch'
'andmuch' is an anagram of 'duchman'.
'duchman' placed around 't' is 'DUTCHMAN'.
(Other definitions for dutchman that I've seen before include "His uncles speaking frankly" , "European" , "Native of Amsterdam, for example" , "Wagner's seafarer" , "bolster his wife" .)