Man behind losing jacket (4)
I believe the answer is:
otto
'man' is the definition.
(I have seen 'A man' mean 'otto' so perhaps 'man' could also mean 'otto')
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for otto that I've seen before include "Palindromic German name like Bismark's" , "Name of four German kings" , "Something essential" , "Swiss perhaps" , "fragrance comes from?" .)