The most common and most likely answer to this crossword clue is the 9 letter word TRELLISED
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More clues leading to the result TRELLISED
Buddy explains!

The straight part
We know that "like some climbers" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case like some climbers = trellised.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 TRELLISED mean?
TRELLISED verb- To train or arrange (plants) so that they grow against a trellis.
- Having, or formed as, a trellis.