He feigns attacks (10)
I believe the answer is:
malingerer
'he feigns attacks' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'he' is the wordplay.
I cannot quite understand how this works, but
'he' could be 'inger' and 'inger' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for malingerer that I've seen before include "Shirker" , "He's not bad, really" , "One off work pretending to be ill" , "Slacker" , "I avoided work?" .)