Hard to handle (8)
I believe the answer is:
unwieldy
'hard to handle' is the definition.
(something unwieldy is hard to handle or control)
This is the entire clue.
(Other definitions for unwieldy that I've seen before include "Ponderous" , "Cumbersome" , "Awkward to move because of shape and weight" , "Large and awkward to carry or manage" , "Hard to manage" .)