Unusual like men being benevolent people (10)
I believe the answer is:
oddfellows
'benevolent people' is the definition.
I know nothing about this answer so I can't judge whether this works.
'unusual like men' is the wordplay.
'unusual' becomes 'odd' (similar in meaning).
'like men' becomes 'fellows' (fellow is a kind of man. I am not sure about the 'like' bit.).
'odd'+'fellows'='ODDFELLOWS'
'being' is the link.
Can you help me to learn more?
(Another definition for oddfellows that I've seen is " Members of a particular fraternity".)