Feathered missile (5)
'feathered missile' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for arrow that I've seen before include "Missile, bolt" , "Missile fired from bow" , "The bowman's missile" , "Quarrel, fired from crossbow" , "Bolt, quarrel" .)
(Other definitions for dart that I've seen before include "Shoot out" , "Run suddenly" , "Slender pointed missile" , "Arrow; dash" , "Devon river - bound - race" .)