Cry and cry (3)
I believe the answer is:
sob
'cry and cry' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sob that I've seen before include "Cry noisily" , "Weep heavily, wail" , "Cry bitterly" , "Expression of distress" , "Weep noisily" .)