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In a small room, partners swapped a baked treat (6)

Ross

I believe the answer is:

pastry

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(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)'" .)

I've seen this clue in The Hindu.
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