He alone moves out around midnight (6)
I believe the answer is:
angelo
'he' is the definition.
'alone moves out around midnight' is the wordplay.
'moves' indicates an anagram.
'out' means one lot of letters goes inside another.
'around midnight' becomes 'g' (the middle letter in 'night'. I am not sure about the 'around' bit.).
'alone' is an anagram of 'anelo'.
'anelo' enclosing 'g' is 'ANGELO'.
Can you help me to learn more?
(Other definitions for angelo that I've seen before include "Shakespearean role" , "Duke's deputy" , "Man" , "See 5" , "Italian male name meaning messenger" .)