The most common and most likely answer to this crossword clue is the 4 letter word WILD
I've seen this crossword clue in The Guardian
W
I
L
D
More clues leading to the result WILD
- Wife I left – and daughter – will be angry
- Furious with nothing inside except strong meat
- Terrific stink! A drummer returned weed
- Angry author of plays on the radio
- Left tucking into extra, not finished, enjoyable
- Said to have passed time in the jungle, perhaps
- Wicket, one getting Lord’s really excited
- A fruitless pursuit, so each goes off seething at first?
- Report of one-time occupant of Reading gaol being unruly
- Playwright from Dublin cut short, furious
Buddy explains!

The straight part
We know that "in the jungle, perhaps" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case in the jungle, perhaps = wild.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 WILD mean?
WILD noun- The undomesticated state of a wild animal
- (chiefly in the plural) a wilderness
- To commit random acts of assault, robbery, and rape in an urban setting, especially as a gang.
- Untamed; not domesticated; specifically, in an unbroken line of undomesticated animals (as opposed to feral, referring to undomesticated animals whose ancestors were domesticated).
- From or relating to wild creatures.
- Unrestrained or uninhibited.
- Raucous, unruly, or licentious.
- Visibly and overtly anxious; frantic.
- Disheveled, tangled, or untidy.
- Enthusiastic.
- Inaccurate.
- Exposed to the wind and sea; unsheltered.
- Hard to steer; said of a vessel.
- (of a knot) Not capable of being represented as a finite closed polygonal chain.
- Amazing, awesome, unbelievable.
- Able to stand in for others, e.g. a card in games, or a text character in computer pattern matching.
- Inaccurately; not on target.
- A wood or forest
- An open country