Restaurant British fool put on lake (9)
I believe the answer is:
brasserie
'restaurant' is the definition.
(brasserie is a kind of restaurant)
'british fool put on lake' is the wordplay.
'british' becomes 'br' (abbreviation for British).
'fool' becomes 'ass' (both can mean a stupid person).
'put on' says to put letters next to each other (some letters go on or after others).
'lake' becomes 'Erie' (Lake Erie is one of the Canadian/US 'Great Lakes').
'br'+'ass'+'erie'='BRASSERIE'
(Other definitions for brasserie that I've seen before include "eatery" , "bar in Paris" , "bar serving food" , "Small restaurant serving alcohol as well as food" , "French-style restaurant" .)