Sweet maiden adopted by court officer depressed (11)
I believe the answer is:
marshmallow
'sweet' is the definition.
(marshmallow is a kind of sweet)
'maiden adopted by court officer depressed' is the wordplay.
'maiden' becomes 'm' (cricket abbreviation).
'adopted by' indicates putting letters inside (I've seen this in other clues).
'court officer' becomes 'marshal'.
'depressed' becomes 'low' ('low' can be a synonym of 'depressed').
'm' going into 'marshal' is 'marshmal'.
'marshmal'+'low'='MARSHMALLOW'
(Other definitions for marshmallow that I've seen before include "Spongy jellylike sweet" , "Confection commonly toasted" , "Spongy confection - wild flower" , "Soft sweet" , "Sweet, often toasted" .)