No vehicle leaving with flowers (7)

I believe the answer is:

nosegay

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'flowers' is the definition.
(I've seen this before)

I can't explain the remainder of the clue.

(Other definitions for nosegay that I've seen before include "Posy of flowers" , "Small posy" , "Old-fashioned posy" , "bunch of pansies?" , "Gone, say (anag)" .)

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