Inspector General John’s ice-house? (5)

I believe the answer is:

igloo

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'ice-house?' is the definition.
(I've seen this before)

'inspector general john's' is the wordplay.
'inspector general' becomes 'ig' (this might be a standard abbreviation of which I'm unaware).
'john' becomes 'loo' (loo is a kind of john).
'ig'+'loo'='IGLOO'

Can you help me to learn more?

(Other definitions for igloo that I've seen before include "Ice-block construction" , "Icy home for Eskimo" , "Inuit hut" , "Snow-house" , "northern home" .)

I've seen this clue in The Hindu.

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