Cheer once, making waves in harmony (9)

I believe the answer is:

coherence

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'waves in harmony' is the definition.
'coherence' can be an answer for 'harmony' (I've seen this in another clue). I am unsure of the 'waves in' bit.

'cheer once making' is the wordplay.
'making' indicates an anagram.
'cheer'+'once'='cheeronce'
'cheeronce' is an anagram of 'COHERENCE'.

Can you help me to learn more?

(Other definitions for coherence that I've seen before include "union" , "ability to talk sense" , "sense of unity" , "Sticking together" , "Logical consistency" .)

I've seen this clue in the Sydney Morning Herald.

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