"Odd choice of choirs", said chap in outlying region of France (7)
I believe the answer is:
corsica
'region of france' is the definition.
'Corsica' can be an answer for 'region' (Corsica is an example). I'm not sure about the 'of france' bit.
'odd choice of choirs said chap in outlying' is the wordplay.
I cannot really understand how this works, but
'of' could be 'o' and 'o' is present in the answer.
'chap' could be 'si' and 'si' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for corsica that I've seen before include "Mediterranean island, birthplace of Napoleon" , "French Mediterranean island" , "Mediterranean island, chief city Ajaccio" , "French island off W Italy, birthplace of Napoleon" , "Island north of Sardinia" .)