Walker appearing late? (5)
I believe the answer is:
ghost
'walker' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps there's an association between them I don't understand?
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for ghost that I've seen before include "Spectre, wraith" , "who has a haunting act?" , "Apparition; faint trace" , "Author, secretly" , "author for someone" .)