Energetic start to play occupies everyone performing (3,6)

I believe the answer is:

all action

'energetic' is the definition.

'start to play occupies everyone performing' is the wordplay.
'start to play' becomes 'acti' (act one).
'occupies' means one lot of letters goes inside another.
'everyone' becomes 'all' (I've seen this before).
'performing' becomes 'on' (I've seen this in other clues).
'all'+'on'='allon'
'acti' going inside 'allon' is 'ALL ACTION'.

I've seen this clue in The Guardian.

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