The stuff of drama? (3)

I believe the answer is:

rep

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

I can't explain the remainder of the clue.

(Other definitions for rep that I've seen before include "what a draper usually sells" , "Theatre; fabric; salesman" , "Salesperson" , "Corded cloth for short theatrical group" , "Fabric with a ribbed surface" .)

I've seen this clue in the Evening Standard.

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