The most common and most likely answer to this crossword clue is the 12 letter word SKATEBOARDER
I've seen this crossword clue in The Guardian
S
K
A
T
E
B
O
A
R
D
E
R
More clues leading to the result SKATEBOARDER
- Small girl, not a day pupil, one standing when riding
- Upright rider’s second woman at frontier, we hear
- One gliding along, fishy pupil at Eton, say
- Ray, pupil staying at a school, is one who has fun riding on wheels?
- Traveller on wheels, hog, streaked madly around
- Second girl on edge about a daring sportsman?
Buddy explains!
The straight part
We know that "One gliding along" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one gliding along = skateboarder.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does SKATEBOARDER mean?
SKATEBOARDER noun- A person who rides a skateboard.