Crossword Genius

Explain how to record one's vote (3,6)

Ross

I believe the answer is:

put across

I'm a little stuck... Click here to teach me more about this clue!

'explain' is the definition.
(I've seen this before)

'to record one's vote' is the wordplay.
I cannot quite understand how this works, but
'one's' could be 'os' (I've seen this in other clues) and 'os' is found in the answer.
This explanation may well be incorrect...

'how' acts as a link.

Can you help me to learn more?

(Other definitions for put across that I've seen before include "Effectively communicate" , "Effectively express" , "Explain" , "communicate comprehensibly" , "Spell out" .)

I've seen this clue in The Globe and Mail.
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