Runner at risk we removed (5-3)
I believe the answer is:
water-ski
'runner' is the definition.
(water ski is a kind of runner)
'at risk we removed' is the wordplay.
'removed' is an anagram indicator (moved again).
'at'+'risk'+'we'='atriskwe'
'atriskwe' with letters rearranged gives 'WATER-SKI'.
(Other definitions for water-ski that I've seen before include "Glide over a lake or sea" , "Travel behind speedboat" , "To ride behind a speedboat" , "Aquatic sport accessory" , "Get towed behind a motorboat" .)