Man set out to be an organ of male reproduction (6)
I believe the answer is:
stamen
'organ of male reproduction' is the definition.
'stamen' can be an answer for 'organ' (I have seen 'Reproductive organ' mean 'stamen' so perhaps 'organ' could also mean 'stamen'). I'm not certain of the 'of male reproduction' bit.
'man set out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'man'+'set'='manset'
'manset' is an anagram of 'STAMEN'.
'to be an' is the link.
Can you help me to learn more?
(Other definitions for stamen that I've seen before include "Pollen producer" , "Section of a flower" , "Part of flower producing pollen" , "Male fertilising organ of flowering plants" , "Bit of a bloomer" .)