The most common and most likely answer to this crossword clue is the 5 plus 3 letter word SWEET PEA
I've seen this crossword clue in The Times
S
W
E
E
T
P
E
A
More clues leading to the result SWEET PEA
- Ascent's ending in panorama before each climber
- Gentle exercise taken with a climber
- Send first of trainees in to clean each plant
- Gentle exercise with a climber
- Tiny tip one's left in main plant
- . Special little infusion containing phosphorus for fragrant flower
- Spoke of rooms with endless ringing
- Second small beverage source of pleasure inside plant
- Small, small, small amount of money invested in tea plant
- We put in hardened seed to produce plant
Buddy explains!

The straight part
We know that "climber" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case climber = sweet pea.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.