Didn't suffer quietly (6)
I believe the answer is:
'didn't suffer quietly' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for moaned that I've seen before include "Made low sound of pain or distress" , "Made low sound of pain - or grumbled" , "Made low mournful sound as of pain" , "Complained" , "A demon (anag.)" .)