Strangely, casual attire on you at first elicits words of warning (10,5)

I believe the answer is:

cautionary tales

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'elicits words of warning' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'strangely casual attire on you at first' is the wordplay.
'strangely' indicates anagramming the letters.
'at first' indicates taking the first letters.
The first letter of 'you' is 'y'.
'casual'+'attire'+'on'+'y'='casualattireony'
'casualattireony' anagrammed gives 'CAUTIONARY TALES'.

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(Another definition for cautionary tales that I've seen is " Light verses".)

I've seen this clue in The Guardian.

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