Groundwork backfiring in appetite for party piece? (5,5)

'party piece?' is the definition.
(paper plates might be used at a party)

'groundwork backfiring in appetite' is the wordplay.
'groundwork' becomes 'prep' (groundwork can mean preparation).
'backfiring' says the letters should be written backwards.
'in' means one lot of letters goes inside another.
'appetite' becomes 'palate' (palate can mean someone's appetite).
'prep' backwards is 'perp'.
'perp' going within 'palate' is 'PAPER PLATE'.

'for' acts as a link.