On a leash (8)
I believe the answer is:
tethered
'on a leash' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for tethered that I've seen before include "Not free" , "Tied (animals) up" , "Bound" , "Fastened with rope or chain, like animal" , "Of animal, secured or hobbled" .)