Dined in a noble chateau (3)
I believe the answer is:
ate
'dined' is the definition.
(I've seen this in another clue)
'in a noble chateau' is the wordplay.
'in' says the answer is hidden in the clue.
'ATE' is hidden in the letters of 'noble chateau'.
(Other definitions for ate that I've seen before include "Devoured" , "Munched" , "Took food" , "Ingested" , "included in one's diet" .)