Representative groups idle on stage unfortunately (11)

I believe the answer is:

delegations

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'representative groups' is the definition.
The answer and definition can be both groups as well as being plural nouns.
Perhaps they are linked in a way I don't understand?

'idle on stage unfortunately' is the wordplay.
'unfortunately' indicates an anagram (a bad or unfortunate spelling).
'idle'+'on'+'stage'='idleonstage'
'idleonstage' with letters rearranged gives 'DELEGATIONS'.

Can you help me to learn more?

I've seen this clue in The Times.

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