Held up flow or flower (7)
I believe the answer is:
stemmed
'held up' is the definition.
Both the definition and answer are adjectives. Maybe they are linked in a way I don't understand?
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for stemmed that I've seen before include "like busy Lizzie?" , "Arose or derived from" , "Brought to a standstill" , "Stopped (a flow)" , "Originated from" .)