1) Clad 2) Clad like a grad 3) Clothed 4) Dressed for a ball 5) Dressed for the ball 6) Togaed 7) Wearing a fancy dress 8) Wearing a gown Found on https://www.crosswordclues.com/clue/gowned
Gowned p. adjective Dressed in a gown; clad. « Gowned in pure white, that fitted to the shape.» Tennyson. Found on http://www.encyclo.co.uk/webster/G/47