Pointed projectile (5)
'pointed projectile' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for arrow that I've seen before include "One in a quiver" , "Quarrel, fired from crossbow" , "Projectile from bow" , "Narrow missile" , "Archer's missile" .)
(Other definitions for dart that I've seen before include "Arrow - go fast" , "flash" , "Devon river - bound - race" , "Small arrow" , "Dash; pointed missile" .)