Game with a bull's-eye (5)
I believe the answer is:
'game with a bull's-eye' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for darts that I've seen before include "Tears" , "Game with arrows and a board" , "They are thrown at targets in pubs" , "Game; moves quickly" , "Traditional pub game" .)