Elusive flower? (9)
I believe the answer is:
pimpernel
'flower?' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for pimpernel that I've seen before include "Baroness Orczy's scarlet flower?" , "The Scarlet ..., aka Sir Percy Blakeney" , "Target for revolutionary French" , "Low-growing plant" , "associated with Blakeney?" .)