Serve into, or tip out, fragrant mixture (9)
I believe the answer is:
potpourri
'fragrant mixture' is the definition.
(a potpourri is a mixture with a nice smell)
'serve into or tip out' is the wordplay.
'serve' becomes 'pour' (as in pouring wine).
'into' means one lot of letters goes inside another.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'or'+'tip'='ortip'
'ortip' is an anagram of 'potri'.
'pour' inserted within 'potri' is 'POTPOURRI'.
(Other definitions for potpourri that I've seen before include "Flower petals and spices used as perfume" , "Mixture of petals, spices etc." , "Bowl or jar of fragrant petals and spices" , "Petals and spice mixture; medley" , "Mixed bag - rip up root (anag)" .)