People there wreck a tent at ball (10)

I believe the answer is:

attendance

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'people there wreck a tent at ball' is the definition.
I can't judge whether this defines the answer.

'wreck a tent at ball' is the wordplay.
'wreck' indicates an anagram.
'at' is a charade indicator (letters next to each other).
'ball' becomes 'dance' (I've seen this before).
'a'+'tent'='atent'
'atent' with letters rearranged gives 'atten'.
'atten'+'dance'='ATTENDANCE'

Can you help me to learn more?

(Other definitions for attendance that I've seen before include "Act of being present" , "how many are watching?" , "Number at gathering" , "People present" , "all that turned up" .)

I've seen this clue in The Guardian.

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