Flower climbed (4)
I believe the answer is:
rose
I believe this clue is a double definition.
'flower' is the first definition.
(I've seen this before)
'climbed' is the second definition.
(Other definitions for rose that I've seen before include "Gained altitude" , "Moved upwards for the flower" , "Prickly garden plant" , "Dusky pink" , "was being promoted" .)