Lake between California and Nevada (5)
I believe the answer is:
tahoe
'lake between california and nevada' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tahoe that I've seen before include "US lake" , "Lake/desert resort on the California-Nevada border" , "Nevada/California lake" , "Lake in Sierra Nevada mountains" , "Mountain lake" .)