Crossword Genius

Custom at home (7)

Ross

I believe the answer is:

habitat

'home' is the definition.
(thesaurus)

'custom at' is the wordplay.
'custom' becomes 'habit' (habit is a kind of custom).
'habit'+'at'='HABITAT'

(Other definitions for habitat that I've seen before include "home, naturally" , "Natural home of a plant or animal" , "Natural home of an organism" , "One's normal environment" , "Where something's usually found" .)

I've seen this clue in The Telegraph.
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