Stupidly used a mop on a computer requirement (5,3)

I believe the answer is:

mouse pad

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'a computer requirement' is the definition.
I know nothing about this answer so I can't judge whether this works.

'stupidly used a mop' is the wordplay.
'stupidly' is an anagram indicator (a stupid ordering of the letters).
'used'+'a'+'mop'='usedamop'
'usedamop' anagrammed gives 'MOUSE PAD'.

'on' is the link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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