Cry out for –hush” (5)
I believe the answer is:
shout
'cry' is the definition.
(synonyms)
'out for hush' is the wordplay.
'for' says to put letters next to each other (I've seen this in other clues).
'hush' becomes 'sh'.
'out' put after 'sh' is 'SHOUT'.
(Other definitions for shout that I've seen before include "Yell" , "bellow" , "Utter a loud cry" , "(Statement) with opposite sense intended" , "Raise one's voice" .)