A Welshman's platform? (4)

I believe the answer is:

dais

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'platform' is the definition.
(dais is a kind of platform)

I can't explain the remainder of the clue.

(Other definitions for dais that I've seen before include "Raised floor" , "Said (anag.)" , "Piece of old cloth" , "Said to be a low platform" , "stage" .)

I've seen this clue in the Evening Standard.

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