The demeanour of one put among males (4)
I believe the answer is:
mien
'the demeanour' is the definition.
(mien is a kind of demeanour)
'one put among males' is the wordplay.
I cannot quite understand how this works, but
'one' could be 'i' (Roman numeral) and 'i' is found in the answer.
'males' could be 'men' (man is a kind of male) and 'men' is located in the leftover letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'of' is the link.
Can you help me to learn more?
(Other definitions for mien that I've seen before include "person's look" , "A person's demeanour" , "Facial expression sounds miserly" , "A manner like mine" , "aspect" .)