Immigrant upset Conservative women meeting head of state (8)
I believe the answer is:
newcomer
'immigrant' is the definition.
(thesaurus)
'upset conservative women meeting head of state' is the wordplay.
'upset' indicates an anagram.
'conservative' becomes 'c' (abbreviation commonly used in UK politics).
'meeting' means one lot of letters go next to another.
'head of state' becomes 'er' (abbreviation for Elizabeth Regina).
'c'+'women'='cwomen'
'cwomen' anagrammed gives 'newcom'.
'newcom'+'er'='NEWCOMER'
(Other definitions for newcomer that I've seen before include "Parvenu" , "2 arrival" , "Recent arrival" , "Immigrant" , "Starter" .)