Salty droplet (4)
I believe the answer is:
tear
'salty droplet' 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 "wrench" , "Lacerate - sign of sorrow" , "Rip - drop from eye" , "Lachrymal drop - rip" , "'A rip, binge or drop of saline solution (4)'" .)