Reach where you can have tea in a great setting (3,2)

I believe the answer is:

get at

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'reach' is the definition.
(getting at is a kind of reaching)

I can't explain the rest of the clue.

(Other definitions for get at that I've seen before include "Intend" , "Criticise (someone)" , "Unfairly influence" , "Pick on - gain access to" , "Reach - mean - attack verbally" .)

I've seen this clue in the Evening Standard.

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