As grown in country estates? (3)
I believe the answer is:
rye
'as grown' is the definition.
The definition and answer are not the same part of speech.
'in country estates?' is the wordplay.
'in' says the answer is hidden in the clue.
'RYE' is hidden within 'country estates'.
Can you help me to learn more?
(Other definitions for rye that I've seen before include "Grass related to wheat" , "place in East Sussex" , "Whiskey (US)" , "Burns's body came through" , "American whisky" .)