India dividing NATO partners Greece and Turkey? (7)
I believe the answer is:
nations
'greece and turkey?' is the definition.
(Greece and Turkey are nations)
'india dividing nato partners' is the wordplay.
'india' becomes 'i' (phonetic alphabet: alpha, bravo, charlie etc.).
'dividing' is an insertion indicator.
'partners' becomes 'ns' (North and South are partners in the game bridge).
'i' going into 'nato' is 'natio'.
'natio'+'ns'='NATIONS'
(Other definitions for nations that I've seen before include "No stain (anag.)" , "Countries" .)