Some Luddite man resumes turning handle on computer (8)
I believe the answer is:
username
'handle on computer' is the definition.
I know nothing about this answer so I can't judge whether this works.
'some luddite man resumes turning' is the wordplay.
'some' says the answer is hidden in the clue (some parts of the word are used).
'turning' says the letters should be written in reverse.
'emanresu' is hidden within 'luddite man resumes'.
'emanresu' written backwards gives 'USERNAME'.
Can you help me to learn more?
(Other definitions for username that I've seen before include "Something needed for logging in" , "Electronic identity" , "One's identifier on a computer" , "Person's computer ID" , "Online identity" .)