Small sealed bag (6)
I believe the answer is:
sachet
'small sealed bag' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for sachet that I've seen before include "Cheats (anag) -- small porous bag" , "Scent bag - shampoo envelope" , "Small bag or packet" , "Small bag - chaste (anag)" , "Small soft bag, containing perfumed powder perhaps" .)