The most common and most likely answer to this crossword clue is the 4 letter word PARK
I've seen this crossword clue in The Guardian
P
A
R
K
More clues leading to the result PARK
- Leave car electrician has failed to start
- Leave Father Jack in the end holding last of liquor
- Scottish explorer’s short weatherproof coat
- Scottish explorer to stop and leave
- Temporarily leave leisure area
- Open space for three chess pieces to take one
- . Korean explorer
- Outdoor area, one surrounded by three men?
- Pull up grass here?
- Common or standard weekend
Buddy explains!

The straight part
We know that "Outdoor area" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case outdoor area = park.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 PARK mean?
PARK noun- An area of land set aside for environment preservation or recreation.
- A wide, flat-bottomed valley in a mountainous region.
- An area used for specific purposes.
- An inventory of matériel.
- A space in which to leave a car; a parking space.
- To bring (something such as a vehicle) to a halt or store in a specified place.
- To defer (a matter) until a later date.
- To bring together in a park, or compact body.
- To enclose in a park, or as in a park.
- To hit a home run, to hit the ball out of the park.
- To engage in romantic or sexual activities inside a nonmoving vehicle.
- (sometimes reflexive) To sit, recline, or put, especially in a manner suggesting an intent to remain for some time.
- To invest money temporarily in an investment instrument considered to relatively free of risk, especially while awaiting other opportunities.
- To register a domain name, but make no use of it (See domain parking)
- (oyster culture) To enclose in a park, or partially enclosed basin.
- To promenade or drive in a park.
- (of horses) To display style or gait on a park drive.