Herb consumed by personage, routinely passed to the left (7)
I believe the answer is:
oregano
'herb' is the definition.
(oregano is a kind of herb)
'consumed by personage routinely passed to the left' is the wordplay.
'consumed by' indicates a hidden word (I've seen this in other clues).
'to the left' is a reversal indicator (reading from right to left).
'onagero' is hidden in the letters of 'personage routinely passed'.
'onagero' in reverse letter order is 'OREGANO'.
(Other definitions for oregano that I've seen before include "Mediterranean herb" , "herbal preparation" , "Dried marjoram" , "Kitchen herb" , "Herb related to marjoram" .)