My best aim took out odd mountain man (4)
I believe the answer is:
yeti
'man' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps there's an association between them I don't understand?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for yeti that I've seen before include "imaginary beast?" , "Himalayan monster?" , "... and creature supposedly there" , "mythical creature" , "doubts in its existence" .)