Flower was a climber? (4)
I believe the answer is:
rose
This could be a double definition.
'flower' is the first definition.
(I know that rose is a type of flower)
'a climber?' is the second definition.
The answer and definition can be both plants as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'was' is the link.
(Other definitions for rose that I've seen before include "Moved upwards for the flower" , "mounted" , "Flower - girl - got up" , "Prickly shrub with bright flowers" , "vacated bed" .)