First of colonists in Armenia moving from Georgia, say? (8)
I believe the answer is:
american
'from georgia say?' is the definition.
(Georgia is a US state)
'first of colonists in armenia moving' is the wordplay.
'first of colonists' becomes 'c' (1st letter of 'colonists').
'in' is an insertion indicator.
'moving' indicates an anagram.
'armenia' anagrammed gives 'amerian'.
'c' going into 'amerian' is 'AMERICAN'.
(Other definitions for american that I've seen before include "Native to the USA" , "Person from the States" , "like Buffalo Bill" , "Person from the US" , "one like Garfield?" .)