Lovely puzzle this, with a real head-scratcher of a competition clue.
Can't for the life of me parse 8d though - I'm about to give a spoiler.
Un'devilled' it reads 'it 's topping for those in the sun, a certain core.'
I'm pretty sure it's PITH (PIT are right), as in 'core', but have no idea why! Any ideas? Thanks in advance!