Higher note is obvious on the end (8)

I believe the answer is:

overtone

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'higher note' is the definition.
'overtone' can be an answer for 'note' (thesaurus). I'm not certain of the 'higher' bit.

'obvious on the end' is the wordplay.
'obvious' becomes 'overt' (similar in meaning).
'end' indicates one should take the final letters.
The last letter of 'the' is 'e'.
'overt'+'on'+'e'='OVERTONE'

'is' acts as a link.

Can you help me to learn more?

(Other definitions for overtone that I've seen before include "Hint" , "Nuance" , "Subtle extra meaning" , "Subtle quality" , "Innuendo perhaps" .)

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

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