Carried on to make flavouring (9)
I believe the answer is:
coriander
'flavouring' is the definition.
(coriander is a kind of flavouring)
'carried on to make' is the wordplay.
'to make' indicates an anagram.
'carried'+'on'='carriedon'
'carriedon' with letters rearranged gives 'CORIANDER'.
(Other definitions for coriander that I've seen before include "leaves for cooking" , "Herb used with carrot for soup" , "Parsley-like herb used in cooking" , "Carried on with the strange herb" , "Aromatic herb" .)