Crossword Genius

Piano tune with cymbals, say! (4)

Ross

I believe the answer is:

pair

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

'cymbals say' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

'piano tune' is the wordplay.
'piano' becomes 'p'.
'tune' becomes 'air' (synonyms).
'p'+'air'='PAIR'

'with' is the link.

Can you help me to learn more?

(Other definitions for pair that I've seen before include "2" , "item" , "Set of two" , "Agreement to avoid division" , "flight of stairs" .)

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