Set tea out in the grounds (6)
I believe the answer is:
estate
'grounds' is the definition.
(I've seen this before)
'set tea out in' is the wordplay.
'set' becomes 'est' (I can't justify this - if you can you should believe this answer much more).
'out' indicates an anagram (out can mean wrong or inaccurate).
'in' is an insertion indicator.
'tea' anagrammed gives 'ate'.
'est' put within 'ate' is 'ESTATE'.
'the' acts as a link.
Can you help me to learn more?
(Other definitions for estate that I've seen before include "park perhaps" , "All of one's assets and liabilities" , "Desmesne" , "The whole of one's possessionsat death" , "The whole of one's worldly goods" .)