Used by Penny, different British plant used in cooking (3,4)

I believe the answer is:

pot herb

I'm a little stuck... Click here to teach me more about this clue!

'plant used in cooking' is the definition.
'pot herb' can be an answer for 'plant' (type of plant). I'm unsure of the 'used in cooking' bit.

'used by penny different british' is the wordplay.
'used by' says to put letters next to each other.
'penny' becomes 'p' (short for pence).
'different' becomes 'other' (similar in meaning).
'british' becomes 'b' (abbreviation e.g. in BBC).
'p' put next to 'other' is 'pother'.
'pother'+'b'='POT-HERB'

Can you help me to learn more?

(Other definitions for pot herb that I've seen before include "culinary plant" , "Vegetable adding flavour" , "sage, perhaps" .)

I've seen this clue in The Daily Express.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.