Wailed (6)
(Other definitions for moaned that I've seen before include "A demon (anag.)" , "Complained" , "Made low sound of pain or distress" , "Made low mournful sound as of pain" , "Made low sound of pain - or grumbled" .)
'wailed' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for bawled that I've seen before include "Gave a loud cry" , "Shouted" , "Cried noisily like baby seeking attention" , "Wept noisily like squalling infant" , "Bellowed" .)