Motor back in the district of ancient Balkans (6)
I believe the answer is:
thrace
'district of ancient balkans' is the definition.
The definition and answer can be both locations as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'motor back in the' is the wordplay.
'motor' becomes 'car' (informal term for car).
'back' shows that the letters should be reversed in order.
'in' means one lot of letters goes inside another.
'car' back-to-front is 'rac'.
'rac' going inside 'the' is 'THRACE'.
Can you help me to learn more?
(Other definitions for thrace that I've seen before include "Region of SE Balkans" , "Balkan area" , "old part of Europe" , "Ancient region now in Greece and Bulgaria" , "The car (anag.); historical region" .)