NEW YORK, June 21 (Reuters) - * The Toronto Stock Exchange's S&P/TSX fell 85.80 points, or 0.52 percent, to 16,335.15. * The biggest contributor to the TSX loss was Suncor Energy , and energy was the biggest drag among sectors. * Leading the index were Aphria Inc, up 5.4 percent, Canopy Growth Corp, up 5.3 percent, and Aurora Cannabis Inc , higher by 4.8 percent. * Lagging shares were Precision Drilling Corp, down 5.1 percent, Shopify Inc, down 4.7 percent, and Cenovus Energy Inc, lower by 4.6 p