He turns up after all (9)
I believe the answer is:
latecomer
'he turns up after all' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
This is all the clue.
Can you help me to learn more?
(Other definitions for latecomer that I've seen before include "Unpunctual type o" , "one's a poor timekeeper" , "One who arrives tardily, not punctually" , "One arriving after time" , "Recent convert" .)