Weeps uncontrollably (4)
I believe the answer is:
sobs
'weeps uncontrollably' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sobs that I've seen before include "convulsions" , "Weeps audibly" , "Weeps noisily" , "Weeps heavily (4)" , "Cries noisily" .)