Restaurant may make money situated by lake (9)
I believe the answer is:
brasserie
'restaurant' is the definition.
(brasserie is a kind of restaurant)
'money situated by lake' is the wordplay.
'money' becomes 'brass' (informal term for money).
'situated by' says to put letters next to each other.
'lake' becomes 'Erie' (Lake Erie is one of the Canadian/US 'Great Lakes').
'brass'+'erie'='BRASSERIE'
'may make' acts as a link.
(Other definitions for brasserie that I've seen before include "eatery" , "bar in Paris" , "Small restaurant serving alcohol as well as food" , "bar serving food" , "French-style restaurant" .)