Possible Clues:

• Sort of duck, fast mover, one of five crossing lake
• Clown, one of five chasing speedy animal round lake
• Clown in a diamond-patterned costume
• London rugby player
• Buffoon runs into robust issue, one of many?
• Clown produced most of the torment on the foreign brief leave - what's new?
• Buffoon husband, a disaster around the French queen
• Pantomime character to dash round line, pursued by one of siblings
• Most of Harlem takes one in every five from the stage
• Sportsman, one of five in pursuit of fast runner crossing line?