Package wrapped in Spar: Cellophane (6)
I believe the answer is:
parcel
'package' is the definition.
(I know that package can be written as parcel)
'wrapped in spar cellophane' is the wordplay.
'wrapped in' says the answer is hidden in the clue.
'PARCEL' is hidden within 'spar cellophane'.
(Other definitions for parcel that I've seen before include "Piece (of land); something to post" , "One wrapped" , "Small piece of land" , "Packet" , "plot" .)