Crossword Genius

One making his voice heard via ballot box -- nothing odd about that (4)

Ross

I believe the answer is:

alto

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'one making his voice heard via ballot box nothing odd about that' is the definition.
'alto' can be an answer for 'one making his voice heard' (type of singing voice). I am unsure of the remainder of the definition.

'ballot box nothing odd about that' is the wordplay.
'nothing odd about that' indicates alternate letters (letters in odd-numbered positions are removed).
'ballot'+'box'='ballotbox'
The alternating letters of 'ballotbox' are 'ALTO'.

Can you help me to learn more?

(Other definitions for alto that I've seen before include "One who sings" , "Woman's singing voice" , "A singing voice or pitch" , "Voice part" , "Lowest female singing voice" .)

I've seen this clue in The Telegraph.
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