Police force info mother receives right by Canadian lake (11)
I believe the answer is:
gendarmerie
'police force' is the definition.
(gendarmerie is a kind of police force)
'info mother receives right by canadian lake' is the wordplay.
'info' becomes 'gen' (informal term for information).
'mother' becomes 'dam' (female parent of an animal).
'receives' means one lot of letters goes inside another (inserted letters are received).
'right by canadian' becomes 'r' (I am not sure about this - if you are sure you should believe this answer much more).
'lake' becomes 'erie' (Lake Erie is one of the Canadian/US 'Great Lakes').
'dam' going around 'r' is 'darm'.
'gen'+'darm'+'erie'='GENDARMERIE'
Can you help me to learn more?
(Other definitions for gendarmerie that I've seen before include "French law keepers" , "foreign force" , "Nick" , "Police force" , "French paramilitary police" .)