Geordie mate's state? (5)
I believe the answer is:
nepal
'state?' is the definition.
(Nepal is an example)
'geordie mate's' is the wordplay.
'geordie' becomes 'ne' (Geordies are from Tyneside in the North East).
'mate' becomes 'pal' (I've seen this before).
'ne'+'pal'='NEPAL'
(Other definitions for nepal that I've seen before include "Kathmandu's country" , "land" , "Asian country, capital Kathmandu" , "Asian republic" , "somewhere in the Himalayas" .)