Cast of 'Jaws' he directed (4)
I believe the answer is:
shed
'cast' is the definition.
(shedding is a kind of casting)
'of jaws he directed' is the wordplay.
'of' says the answer is hidden in the clue.
'SHED' is hidden within 'jaws he directed'.
(Other definitions for shed that I've seen before include "Throw off; building" , "Jettison" , "Lose or take off in small building" , "Small hut - lose it" , "tools found here?" .)