Sell plenty of new trailers (6)

I believe the answer is:

retail

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

'sell' is the definition.
(I know that retail is a kind of sell)

I can't explain the remainder of the clue.

(Other definitions for retail that I've seen before include "A litre (anag)" , "report" , "This trade sells direct to the public" , "Flog" , "Not wholesale" .)

I've seen this clue in the Evening Standard.

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