Considerable trouble composing trios (5)

I believe the answer is:

riots

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'considerable trouble composing trios' is the definition.
I can't judge whether this definition defines the answer.

'composing trios' is the wordplay.
'composing' indicates anagramming the letters.
'trios' with letters rearranged gives 'RIOTS'.

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(Other definitions for riots that I've seen before include "Public disturbances" , "Protests" , "Acts of violence by unruly mobs" , "Violent disturbances" , "Wild disturbances by crowds" .)

I've seen this clue in the Evening Standard.

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