The Met Office? (8,4)
I believe the answer is:
scotland yard
'the met office?' is the definition.
(headquarters of the Metropolitan Police)
'met office?' is the wordplay.
I cannot really see how this works, but
'met' could be 'yard' (Scotland Yard, Metropolitan Police HQ) and 'yard' is located in the answer.
'office?' could be 'land' (land office is a kind of office) and 'land' is found within the answer.
The remaining letters 'scot' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
(Other definitions for scotland yard that I've seen before include "Former police HQ" , "Detective department of the Metropolitan Police" , "detectives" , "London CID" , "11 13 HQ" .)