Lash it back with a rope's end! (3)
I believe the answer is:
tie
'lash' is the definition.
(thesaurus)
'it back with a rope's end' is the wordplay.
'back' shows that the letters should be reversed in order.
'with' says to put letters next to each other.
'end' suggests the final letters.
The final letter of 'rope' is 'e'.
'it' in reverse letter order is 'ti'.
'ti'+'e'='TIE'
(Other definitions for tie that I've seen before include "Form into a knot or bow" , "Restrict; link" , "Bond > girl wearing this? Unlikely" , "Bind; knot" , "oblige" .)