Ending in food, peculiar herb (4)
I believe the answer is:
dill
'herb' is the definition.
(dill is a kind of herb)
'ending in food peculiar' is the wordplay.
'ending in' suggests the final letters.
'peculiar' becomes 'ill' (**).
The final letter of 'food' is 'd'.
'd'+'ill'='DILL'
(Other definitions for dill that I've seen before include "Fool" , "Herb with thread-like foliage used as seasoning" , "Culinary herb" , "Herb used in cooking" , "Herb commonly used with gravlax" .)