Pays unfairly and cries! (4)
I believe the answer is:
yaps
'cries' is the definition.
The definition and answer can be both to do with communicating as well as being verbs in their -s form.
Maybe you can see an association between them that I can't see?
'pays unfairly' is the wordplay.
'unfairly' indicates anagramming the letters (I've seen this in other clues).
'pays' anagrammed gives 'YAPS'.
'and' is the link.
Can you help me to learn more?
(Other definitions for yaps that I've seen before include "Barks" , "shrill sounds" , "Chatters" .)