The most common and most likely answer to this crossword clue is the 5 letter word LIANA
I've seen this crossword clue in The Times
L
I
A
N
A
More clues leading to the result LIANA
- US city entertaining male climber
- Climber, one’s seen in wood
- Climber needing a spike to climb
- Climber in a fix on the ascent
- Brad brought up a climber
- A device for fastening back climbing plant
- A fastening device put up a vine
- Girl, I gathered, finds something creepy in the forest
- Jungle trailer required for Mongolian adventure
- Climber in middle of Italian Alps
Buddy explains!

The straight part
We know that "climbing plant" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case climbing plant = liana.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 LIANA mean?
LIANA noun- A climbing woody vine, usually tropical.