Platter covering underwear in farce (8)
I believe the answer is:
travesty
'farce' is the definition.
(I know that farce can be written as travesty)
'platter covering underwear' is the wordplay.
'platter' becomes 'tray' (tray for food).
'covering' indicates putting letters inside.
'underwear' becomes 'vest'.
'tray' enclosing 'vest' is 'TRAVESTY'.
'in' is the link.
(Other definitions for travesty that I've seen before include "Farcical imitation" , "False or distorted representation of something" , "Burlesque, parody" , "'Farce, parody (8)'" , "Grossly unfair representation" .)