Parrot to stretch out need for flower (5)
I believe the answer is:
lilac
'for 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 lilac that I've seen before include "Plant" , "Tree - pinkish-purple colour" , "Shade" , "Mauve-like colour" , "Flowering tree of the olive family" .)