Spread out Parmesan, lacking an inferior cheese (9)
I believe the answer is:
mousetrap
'inferior cheese' is the definition.
(cheese of indifferent quality Collins)
'spread out parmesan lacking an' is the wordplay.
'spread' indicates an anagram.
'lacking' is a deletion indicator.
'out'+'parmesan'='outparmesan'
'outparmesan' with 'an' taken away is 'outparmes'.
'outparmes' is an anagram of 'MOUSETRAP'.
(Other definitions for mousetrap that I've seen before include "For instance, old Cheshire" , "pest control device" , "Cheap cheese" , "Rodent catcher" , "This may take the Mickey" .)