Crossword Genius

It's full of hot air (4)

Ross

I believe the answer is:

kiln

(Other definitions for kiln that I've seen before include "Kind of oven" , "Oven for hardening and drying" , "Drying furnace" , "Oven for firing bricks" , "Hops or pottery cooker?" .)

I've seen this clue in The New York Times.
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