Crossword Genius

Architect’s means of keeping the rain out (10)

Ross

I believe the answer is:

mackintosh

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'architect's' is the definition.
(architect Charles Rennie Mackintosh)

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(Other definitions for mackintosh that I've seen before include "Architect" , "Raincoat" , "providing protection from the elements" , "waterproof layer" , "Garment" .)

I've seen this clue in The Times.
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