The most common and most likely answer to this crossword clue is the 10 letter word WINDSURFER
I've seen this crossword clue in The Guardian
W
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N
D
S
U
R
F
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R
More clues leading to the result WINDSURFER
- One stands, taking position on board, prepared for any blow
- Snake more certain to bite head of firm is one on the board?
- 10 perhaps more certain to come across fellow boarder
- Who plays on board to roll, firmer female included
- Maybe one who looks forward to getting on the board
- With US friend adrift on river, someone riding across the water
Buddy explains!
The straight part
We know that "boarder" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case boarder = windsurfer.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 WINDSURFER mean?
WINDSURFER noun- A person who windsurfs.