Man in line-out (4)
I believe the answer is:
neil
'man' is the definition.
(man's name)
'line-out' is the wordplay.
'line' can be anagrammed to 'NEIL'.
But, I am not clear how the anagram is indicated.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for neil that I've seen before include "- Armstrong, first man to walk on the moon" , "-- Armstrong, Apollo astronaut" , "- Simon, US dramatist (Barefoot in the Park)" , "Boy" , "-- Sedaka, US singer" .)