No set back for world leaders surrounded by petals (6)
I believe the answer is:
stamen
'no' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for stamen that I've seen before include "Section of a flower" , "Flower pollen carrier" , "Flower's male reproductive organ" , "Male fertilising organ of flowering plants" , "Pollen-carrying part of flower" .)