Crossword Genius

Says one's piece in a high voice? (6,2)

Ross

I believe the answer is:

speaks up

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

'says' is the definition.
The definition and answer can be both to do with communicating as well as being verbs in their -s form.
Maybe there's an association between them I don't understand?

'one's piece in a high voice?' is the wordplay.
I cannot quite see how this works, but
'piece' could be 'p' (abbreviation for Pawn) and 'p' is found within the answer.
'a' is found in the answer.
'high' could be 'up' (associated in meaning) and 'up' is located in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in the Evening Standard.
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