Girl with user guide starts to remove disc errors (5)
I believe the answer is:
debug
'to remove disc errors' is the definition.
I can't judge whether this definition defines the answer.
'girl with user guide starts' is the wordplay.
'girl' becomes 'deb' ().
'with' means one lot of letters go next to another.
'starts' suggests taking the first letters.
The initial letters of 'user guide' is 'ug'.
'deb'+'ug'='DEBUG'
Can you help me to learn more?
(Other definitions for debug that I've seen before include "correct code?" , "Remove (software) errors" , "Pick off insects" , "Fix software glitches" , "Refrain (from)" .)