Coward (6-5)
'coward' is the definition.
(I've seen this before)
This is all the clue.
(Another definition for yellow-belly that I've seen is " Coward (from Lincolnshire?)".)
(Other definitions for wuss that I've seen before include "Weak person" , "Excessively timid person" .)
'coward' is the definition.
(I know that sissy is a type of coward)
This is all the clue.
(Other definitions for sissy that I've seen before include "Milksop" , "Effeminate boy" , "Effeminate and over-timorous male" , "Feeble and effeminate" , "Timorous person" .)