If you really want to know about it, ask cook! (7)

I believe the answer is:

kitchen

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But I can't explain it at all! Could you help me understand?

(Other definitions for kitchen that I've seen before include "Site of 4 [GAS OVEN]" , "Room for food" , "food preparation area" , "Cook's room" , "Proverbial place of uncomfortable heat" .)

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