Reported occasion for flavouring (5)
I believe the answer is:
thyme
'for flavouring' is the definition.
(thyme is a kind of flavouring)
'reported occasion' is the wordplay.
'reported' indicates a 'sounds like' (homophone) clue.
'occasion' becomes 'time' (I've seen this before).
'time' sounds like 'THYME'.
(Other definitions for thyme that I've seen before include "Part of song: ''parsley, sage, rosemary and . . . . .''" , "Meadow herb" , "Plant used in cooking" , "Aromatic plant" , "A herb; sounds like prison sentence" .)