Place on a leash (6)
I believe the answer is:
tether
'place on a leash' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tether that I've seen before include "Restrictive rope fixed to one spot" , "Rope for hobbling animal" , "Rope to hobble grazing animal" , "End of ones --" , "Rope to fasten or restrain animal" .)