Rude rayon material worn whatever the season (4-5)

I believe the answer is:

year-round

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'worn whatever the season' is the definition.
I can't tell whether this defines the answer.

'rude rayon material' is the wordplay.
'material' is an anagram indicator (the letters provide the material for a new word).
'rude'+'rayon'='ruderayon'
'ruderayon' is an anagram of 'YEAR-ROUND'.

Can you help me to learn more?

(Another definition for year-round that I've seen is " Across all seasons".)

I've seen this clue in the Sydney Morning Herald.

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