One creating a stir in the cup? (8)
I believe the answer is:
teaspoon
'one creating a stir in the cup?' is the definition.
This is the entire clue.
(Other definitions for teaspoon that I've seen before include "Kitchen utensil able to hold about one fluid dram" , "Five millilitres (cookery)" , "which causes a stir!" , "Small stirrer" , "Small piece of cutlery" .)