The most common and most likely answer to this crossword clue is the 8 letter word CLIMBERS
I've seen this crossword clue in Financial Times
C
L
I
M
B
E
R
S
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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 CLIMBERS mean?
CLIMBERS noun- One who climbs.
- A plant that climbs, such as a vine.
- A bird that climbs, such as a woodpecker or a parrot.
- A rider who specializes in riding uphill quickly.