Most rush after member in transparent dress fabric (7)

I believe the answer is:

organza

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'dress fabric' is the definition.
(I've seen this before)

I can't explain the remainder of the clue.

(Other definitions for organza that I've seen before include "Stuff" , "Transparent silky material" , "Silky cloth" , "Transparent silk material" , "Silk (or silk-like) fabric" .)

I've seen this clue in The Hindu.

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