Artificial flowers at zebra crossing (6)
I believe the answer is:
ersatz
'artificial' is the definition.
(similar in meaning)
'flowers at zebra crossing' is the wordplay.
'crossing' says the answer is hidden in the clue (the clue crosses over the answer).
'ERSATZ' can be found hidden inside 'flowers at zebra'.
(Other definitions for ersatz that I've seen before include "Phoney as in Germany" , "Imitation or substitute, from German" , "Cheap substitute or imitation" , "Bogus" , "unnatural" .)