No, her plans changed - things blown high! (10)

I believe the answer is:

alpenhorns

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'blown high' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'no her plans changed' is the wordplay.
'changed' is an anagram indicator.
'no'+'her'+'plans'='noherplans'
'noherplans' is an anagram of 'ALPENHORNS'.

'things' is the link.

Can you help me to learn more?

(Another definition for alpenhorns that I've seen is " wind instruments".)

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

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