Salty drop (4)
I believe the answer is:
tear
'salty drop' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tear that I've seen before include "Hurry" , "Rip - eye moisture" , "Rent - drop" , "A rip goes on a binge?" , "Secretion of the lachrymal glands" .)