Fruit in an ornate tray, nourishing (10)
I believe the answer is:
alimentary
'nourishing' is the definition.
(I've seen this in another clue)
'fruit in an ornate tray' is the wordplay.
'fruit' becomes 'lime' (lime is a kind of fruit).
'in' indicates putting letters inside.
'ornate' indicates anagramming the letters (an unusual or complex form of the letters).
'tray' anagrammed gives 'tary'.
'an'+'tary'='antary'
'lime' inserted inside 'antary' is 'ALIMENTARY'.
(Other definitions for alimentary that I've seen before include "providing nourishment" , "of food" .)