Not exactly hideous place of concealment (7)

I believe the answer is:

hideout

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This clue might be a double definition.

'not exactly hideous place' is the first definition.
'hideout' can be an answer for 'place' (hideout is a kind of place). I'm unsure of the 'not exactly hideous' bit.

'concealment' is the second definition.
(thesaurus)

'of' acts as a link.

Can you help me to learn more?

(Other definitions for hideout that I've seen before include "den" , "retreat" , "sanctuary" , "Place to lie low" .)

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