No vehicle leaving with flowers (7)
I believe the answer is:
nosegay
'flowers' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for nosegay that I've seen before include "Posy of flowers" , "Small posy" , "Old-fashioned posy" , "bunch of pansies?" , "Gone, say (anag)" .)