Commercial property assumptions taken as true (8)

I believe the answer is:

premises

I believe this clue is a double definition.

'commercial property' is the first definition.
(eg business premises)

'assumptions taken as true' is the second definition.
(a premise is an assumption accepted as true)

(Other definitions for premises that I've seen before include "establishment" , "House with its land" , "Assumptions" , "States" , "Buildings occupied by businesses" .)

I've seen this clue in The Telegraph.

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