Vendors named Peter? (7)

I believe the answer is:

sellers

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

This clue could be a double definition.

'vendors' is the first definition.
(I know this)

'named peter?' is the second definition.
'sellers' can be an answer for 'peter?' (I've seen this before). I'm not sure about the 'named' bit.

Can you help me to learn more?

(Other definitions for sellers that I've seen before include "Vendors" , "British actor, star of the 17" , "kind of market" , "Peter" .)

I've seen this clue in the Evening Standard.

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