A singular type intended to dispose of a potpourri (10)
I believe the answer is:
assortment
'potpourri' is the definition.
(I know that potpourri can be written as assortment)
'a singular type intended to dispose of a' is the wordplay.
'singular' becomes 's' (abbreviation sometimes used in dictionaries).
'type' becomes 'sort' (both can mean a kind or variety).
'intended' becomes 'meant' (to mean something is to intend it).
'to dispose of' indicates named letters should be taken away.
'meant' with 'a' removed is 'ment'.
'a'+'s'+'sort'+'ment'='ASSORTMENT'
(Other definitions for assortment that I've seen before include "Mixture" , "Miscellany" , "Miscellaneous collection" , "Variety" , "Medley" .)