Recalled best serve, right one for various things (9)
I believe the answer is:
potpourri
'various things' is the definition.
'recalled best serve right one' is the wordplay.
'recalled' says the letters should be written in reverse.
'best' becomes 'top' ('top' can be similar in meaning to 'best').
'serve' becomes 'pour' (**).
'right' becomes 'r' (common abbreviation).
'one' becomes 'i' (Roman numeral).
'top' reversed gives 'pot'.
'pot'+'pour'+'r'+'i'='POTPOURRI'
'for' acts as a link.
(Other definitions for potpourri that I've seen before include "Petals and spice mixture; medley" , "Perfumed mixture; medley" , "collection with pleasant bouquet" , "Mixture of petals, spices etc." , "assortment of botanical stuff?" .)