Crossword Genius

Clerical temp moving around - it helps him see better (8,4)

Ross

I believe the answer is:

electric lamp

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'it helps him see better' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

'clerical temp moving' is the wordplay.
'moving' indicates an anagram (letters are moved around).
'clerical'+'temp'='clericaltemp'
'clericaltemp' anagrammed gives 'ELECTRIC LAMP'.

'around' acts as a link.

Can you help me to learn more?

I've seen this clue in The Irish Times.
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