Noble Scot's computer not working (7)
I believe the answer is:
macduff
'noble scot's' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'computer not working' is the wordplay.
'computer' becomes 'Mac' (Apple Mac computer).
'not working' becomes 'duff' (duff can mean defective).
'mac'+'duff'='MACDUFF'
Can you help me to learn more?
(Other definitions for macduff that I've seen before include "He was invited to lay on" , "Slayer of 13" , "Murderer of Macbeth" , "One told to lay on" , "Shakespearean character" .)