Crossword Genius

Protective part of stage? (5)


I believe the answer is:


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'part of stage?' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for apron that I've seen before include "Domestic protection" , "Kitchen garment or part of airfield" , "Part of stage in front of the curtain" , "Extension of stage in front of curtain" , "that's used by Oliver!?" .)

I've seen this clue in The Irish Times.
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