2D - substance that stimulates the formation of an agent causing clumping of bacteria, cells etc (12) -g-g--t-----n - (I thought agglutinins but doesn't fit!) 32D - loose outer garments worn in India (7) ---b-h- 19A - genus of butterflies giving its name to a family, usually small and blue or coppery (7) -y-a--- 25A - according to chambers dictionary, a porpoise, dolphin or dugong (3,3) -e- p-- 34A - a water soluble astringent substance (7) c-t-c--