Word with sister or story (3)
I believe the answer is:
sob
'word with sister or story' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sob that I've seen before include "Snivel" , "Weep loudly" , "Cry noisily" , "Weep convulsively" , "Expression of distress" .)