Are such clothes used in the garden? (4,3)

I believe the answer is:

worn out

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'are such clothes' is the definition.
The answer and definition are not the same part of speech. However, adjectives and past participle verbs occasionally mean the same thing.

'used in the garden?' is the wordplay.
'used' becomes 'worn' (I've seen this in another clue).
'in the garden?' becomes 'out' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'worn'+'out'='WORN-OUT'

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I've seen this clue in the Evening Standard.

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