Runners able to kiss? (4)

I believe the answer is:

skis

I'm a little stuck... Click here to teach me more about this clue!

'runners' is the definition.
(I know this)

'able to kiss?' is the wordplay.
'kiss' can be anagrammed to 'SKIS'.
However, I'm not sure how this is indicated.

Can you help me to learn more?

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

I've seen this clue in the Evening Standard.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.