A better lake (8)
I believe the answer is:
superior
This clue is a double definition.
'a better' is the first definition.
(thesaurus)
'lake' is the second definition.
(I've seen this before)
(Other definitions for superior that I've seen before include "Bigger" , "The largest of the Great Lakes" , "One of higher rank" , "Snooty" , "Higher-ranking" .)