Mount a scare with bad butterflies for actors? (11)

I believe the answer is:

stagefright

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'bad butterflies for actors?' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'mount a scare' is the wordplay.
'mount' becomes 'stage' (I've seen this before).
'a scare' becomes 'fright' (I've seen this in another clue).
'stage'+'fright'='STAGEFRIGHT'

'with' is the link.

Can you help me to learn more?

I've seen this clue in The Irish News.

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