Chief to tolerate acrobatic manoeuvre (9)

I believe the answer is:

headstand

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'acrobatic manoeuvre' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe there's a link between them I don't understand?

'chief to tolerate' is the wordplay.
'chief' becomes 'head' (synonyms).
'to tolerate' becomes 'stand' (synonyms).
'head'+'stand'='HEADSTAND'

Can you help me to learn more?

(Other definitions for headstand that I've seen before include "Acrobatic pose" , "Balancing act" .)

I've seen this clue in The Mirror.

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