Fashion designer on TV, dubiously wearing topless costume (7)

I believe the answer is:

vuitton

I'm a little stuck... Click here to teach me more about this clue!

'designer on tv dubiously wearing topless costume' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'fashion' is the wordplay.
I cannot really understand how this works, but
'fashion' could be 'ton' (term for style or fashion) and 'ton' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

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

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