Piece of computer equipment for a schoolchild (7)
I believe the answer is:
monitor
'piece of computer equipment' is the definition.
'monitor' can be an answer for 'equipment' (monitor is a kind of equipment). I am unsure of the 'piece of computer' bit.
'for a schoolchild' is the wordplay.
I cannot really see how this works, but
'for' could be 'to' (eg both can mean 'in the opinion of') and 'to' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for monitor that I've seen before include "Prefect; a loudspeaker" , "one checks continuously" , "Sort of lizard" , "Keep tabs on; lizard" , "Lizard; display screen" .)