Robin's skill (7)
I believe the answer is:
archery
'robin's skill' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for archery that I've seen before include "Target sport - Olympic event in from 1900-08, in 1920 and since 1972" , "Bowmanship" , "Bowman's sport" , "Bow and arrow sport" , "Arrow-shooting" .)