Related Clues:

• There's 11 across of this in H.M.S. Pinafore
• A yellow, foppish feline that's weedy
• Although so weedy he's sounding well-dressed with pride
• Blooming little of this in Pinafore
• 'Sounds like a foppish, beastly, yellow, weedy monarch (9)'
• Vivid yellow shade
• To cause damage, I go 50-500F lower
• Flower toxic to cows, ironically
• Crowfoot's caught in flannel
• A flower that's yellow and black, say, is given a prize
• Part of a 17, say, a beast of a weed
• Died unknown, having eaten 10's weed
• Idol eats ancient royal plant
• Oil dealers about to speak to copper 29
• Fancy up-ending Fido off Lake Bloomer