The most common and most likely answer to this crossword clue is the 5 letter word HEDGE
I've seen this crossword clue in The Guardian
H
E
D
G
E
More clues leading to the result HEDGE
- Cautious statement fellow had withdrawn for example
- Prevaricate, husband having upper hand
- Horse to go over boundary fence
- What makes a good barrier? Avoid a straight answer
- Protect oneself from loss from hard border
- Fence – sit on it?
- Guard “hard” border
- Sit on the fence, or something similar
- Row of shrubs near hospital boundary
- To reduce risk, Harman’s first to move sideways
Buddy explains!

The straight part
We know that "Vegetation/Vegetation" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case vegetation/vegetation = hedge.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 HEDGE mean?
HEDGE noun- A thicket of bushes or other shrubbery, especially one planted as a fence between two portions of land, or to separate the parts of a garden.
- A barrier (often consisting of a line of persons or objects) to protect someone or something from harm.
- A mound of earth, stone- or turf-faced, often topped with bushes, used as a fence between any two portions of land.
- A non-committal or intentionally ambiguous statement.
- Contract or arrangement reducing one's exposure to risk (for example the risk of price movements or interest rate movements).
- (noun adjunct) Used attributively, with figurative indication of a person's upbringing, or professional activities, taking place by the side of the road; third-rate.
- To enclose with a hedge or hedges.
- To obstruct or surround.
- To offset the risk associated with.
- To avoid verbal commitment.
- To construct or repair a hedge.
- To reduce one's exposure to risk.