World's lowest lake (4,3)
I believe the answer is:
dead sea
'world's lowest lake' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for dead sea that I've seen before include "World's lowest lake" , "River Jordan flows into this" , "Disappearing lake" , "R. Jordan lake" , "Saltwater lake in the Jordan valley" .)