Man set out part of bloom (6)
I believe the answer is:
stamen
'part of bloom' is the definition.
('stamen' is part of 'bloom')
'man set out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'man'+'set'='manset'
'manset' is an anagram of 'STAMEN'.
(Other definitions for stamen that I've seen before include "Section of a flower" , "Male part of flower" , "Pollen-bearing organ of flower" , "Pollen producer" , "Male fertilising organ of flowering plants" .)