Foresight of French occupying region (10)
I believe the answer is:
providence
'foresight' is the definition.
(thesaurus)
'of french occupying region' is the wordplay.
'of french' becomes 'de' ('of' in French).
'occupying' means one lot of letters goes inside another (inserted letters occupy or enter the word).
'region' becomes 'province' (province is a kind of region).
'de' put into 'province' is 'PROVIDENCE'.
(Other definitions for providence that I've seen before include "fortune" , "tender care" , "US state capital" .)