Flexible group of musicians that might make a bundle (7,4)

I believe the answer is:

elastic band

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'of musicians that might make a bundle' is the definition.
The definition suggests a singular noun which matches the answer.

'flexible group' is the wordplay.
'flexible' becomes 'elastic' (synonyms).
'group' becomes 'band' (band can mean a group of people).
'elastic'+'band'='ELASTIC BAND'

Can you help me to learn more?

(Other definitions for elastic band that I've seen before include "Stretcher" , "Office item" , "It's flexible" , "Loopy item" , "Loop of thin rubber" .)

I've seen this clue in The Times.

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