Grumble with swinger's joint (6)
I believe the answer is:
whinge
'grumble' is the definition.
(I've seen this before)
'with swinger's joint' is the wordplay.
I cannot really understand how this works, but
'with' could be 'w' (short for with) and 'w' is found within the answer.
'joint' could be 'hinge' (type of joint) and 'hinge' is found in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for whinge that I've seen before include "protest?" , "Grouse" , "Grumble or complain persistently" , "Complain pathetically" , "Whine and grumble persistently" .)