Packet (6)
'packet' is the definition.
(synonyms)
This is all the clue.
(Other definitions for parcel that I've seen before include "Consignment of wrapped items" , "Wrapped missive" , "Package; piece of land" , "Wrapped item in post" , "plot" .)
(Other definitions for sachet that I've seen before include "Sealed plastic substance container" , "Package" , "Small bag - chaste (anag)" , "Little sealed packet" , "Small sealed envelope" .)