Dismember hanged traitor? Mercy! (7)
I believe the answer is:
quarter
This could be a double definition.
'dismember' is the first definition.
(quartering is a kind of dismembering)
'mercy' is the second definition.
(I know that quarter is a type of mercy)
'hanged traitor?' acts as a link.
This may not be correct. Some or all of it may belong to one of the definitions.
Can you help me to learn more?
(Other definitions for quarter that I've seen before include "Area of town; mercy" , "Residence - mercy" , "Cut in four" , "Lodge" , "Part of a town; 25 cents" .)