Dish quietly departed (5)
I believe the answer is:
Here is my best explanation:
'dish' is the definition.
(plate is a kind of dish)
'quietly departed' is the subsidiary indication.
'quietly' becomes 'p' (p for piano and quiet).
'departed' becomes 'late' (I've seen this in other clues).
(Other definitions for plate that I've seen before include "Shallow vessel", "Shallow dish", "Coat with metal", "Put film on", "Flat dish for food", "Cover with metal", "Dish for food", "serve", "Leapt (anag.)" and "Denture".)