Crossword Genius

One making choice to keep broken metal item of circuitry (10)

Ross

I believe the answer is:

voltameter

'item of circuitry' is the definition.

'one making choice to keep broken metal' is the wordplay.
'one making choice' becomes 'voter'.
'to keep' means one lot of letters goes inside another.
'broken' is an anagram indicator.
'metal' with letters rearranged gives 'ltame'.
'voter' placed around 'ltame' is 'VOLTAMETER'.

I've seen this clue in The Telegraph.
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