You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: CHEMISTRY 
Clue: It's a system of small particles "hanging" in a liquid; paint, for example
suspension

Category: MIDDLE INITIAL V. 
Clue: This current world leader's middle initial V. stands for Vladimirovich
vladimir putin

Category: FRUITS & VEGETABLES 
Clue: This, a type of chicory with red or pinkish leaves, is a trendy salad ingredient

radicchio