In a small room, partners swapped a baked treat (6)
I believe the answer is:
pastry
But I can't explain it at all! Could you help me understand?
(Other definitions for pastry that I've seen before include "Sweet baked dough" , "choux, perhaps" , "Piecrust; small cake" , "'It may be puff, shortcrust and flakey (6)'" , "'Dough of flour, fat and water (6)'" .)