Runners get amorous when cycling (4)

I believe the answer is:

skis

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'runners' is the definition.
(ski is a kind of runner)

I cannot understand how the rest of the clue works.

(Other definitions for skis that I've seen before include "Travels on snow" , "Snow runners" , "On these in slalom" , "Swoops downhill" , "Engages in a winter sport" .)

I've seen this clue in The Telegraph.

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