Related Clues:

• It may leave a sour taste in your mouth
• Shade of yellow — fruit
• Dud on the road
• Fruit high in vitamin C
• A fruit; a worthless item
• Unhelpful answer leaving bitter taste?
• Cooking melon is a failure
• Feeble thing (colloq.); fruit tree
• Meadowlark, Globetrotters legend
• E.g. Trotsky and ex-PM imprisoning spy chief could be a twist
• Fruit rind
• Fruit grasped by agile monkey
• Yellow; fruit
• Trotsky, perhaps seen around Mexico's capital - it's most unsatisfactory
• Strong yellow colour