Walker, in part, may be a leader of men (5)
I believe the answer is:
tramp
'walker' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
'in part may be a leader of men' is the wordplay.
'in' means one lot of letters goes inside another.
'may be' is an anagram indicator.
'a leader of' says to take the initial letters.
The initial letter of 'men' is 'm'.
'part' is an anagram of 'trap'.
'trap' placed around 'm' is 'TRAMP'.
Can you help me to learn more?
(Other definitions for tramp that I've seen before include "Vagrant, hobo" , "Derelict - ship" , "Beggar or vagrant" , "Itinerant" , "Footslog" .)