Cappella Clausura and director Amelia LeClair joined with the sacred dance troupe Creationdance to reprise “Gloria: A Renaissance Christmas Pageant,’’ their period-music variation on the familiar Nativity spectacle. The ensemble, dedicated to vocal music by female composers, has presented the pageant for five seasons; while its proportions might be modest (10 musicians, seven dancers, just over an hour) and its splendor episodic, at its best, and in the best possible sense, “Gloria’’ provides escapism of a high order.