The most common and most likely answer to this crossword clue is the 7 letter word MONOSKI
I've seen this crossword clue in The Guardian
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More clues leading to the result MONOSKI
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The cryptic/wordplay part
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What does MONOSKI mean?
MONOSKI noun- A variant of a downhill skiing/alpine skiing ski, that is very wide, allowing for both right and left ski boots to the attached to the same ski, with a doubled-up set of bindings, placed side-by-side. It has the appearance of an extremely wide ski or narrow alpine snowboard, though with binding mounting locations similar to that of a regular ski.
- A type of sitski with a single ski, used by wheelchair-bound skiers in downhill skiing and para-alpine. It is paired with outriggers, ski poles that have skis attached to the bottom, instead of the pick/spike, to function as outrigger runners for the skier sitting in the monoski.
- To use a monoski; to participate in monoskiing.