Handcuffs (8)
I believe the answer is:
manacles
'handcuffs' is the definition.
('manacle' can be a synonym of 'handcuff')
This is all the clue.
(Other definitions for manacles that I've seen before include "chains" , "Fetters for the hands" , "Handcuffs" , "Shackles for the wrist" .)