The most common and most likely answer to this crossword clue is the 4 letter word OPEN
I've seen this crossword clue in The Times
O
P
E
N
More clues leading to the result OPEN
- Such an office aiming to eliminate handwriting?
- On receiving foreign correspondent, promoting large sort of office
- Outside broadcast following sporting event
- Outdoor work with English rain awful
- Frank old writer
- Communicative old writer
- Sporting contest in progress, involving physical exercise
- Candid work in French
- Ingenuous old bird, female, given coat
- Nothing by writer is publicly accessible
Buddy explains!

The straight part
We know that "Outside" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case outside = open.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 OPEN mean?
OPEN adjective- Not closed
- Not physically drawn together, closed, folded or contracted; extended
- Actively conducting or prepared to conduct business.
- Receptive.
- Public
- Candid, ingenuous, not subtle in character.
- (of a formula) Having a free variable.
- (of a set) Which is part of a predefined collection of subsets of X, that defines a topological space on X.
- (of a walk) Whose first and last vertices are different.
- (of a file, document, etc.) In current use; mapped to part of memory.
- Not fulfilled.
- Not settled or adjusted; not decided or determined; not closed or withdrawn from consideration.
- (stringed instruments) Of a note, played without pressing the string against the fingerboard.
- (wind instruments) Of a note, played without closing any finger-hole, key or valve.
- Not of a quality to prevent communication, as by closing waterways, blocking roads, etc.; hence, not frosty or inclement; mild; used of the weather or the climate.
- (Of correspondence) Written or sent with the intention that it may made public or referred to at any trial, rather than by way of confidential private negotiation for a settlement. (Opposite of "without prejudice")
- Uttered with a relatively wide opening of the articulating organs; said of vowels.
- Uttered, as a consonant, with the oral passage simply narrowed without closure.
- (of a syllable) That ends in a vowel; not having a coda.
- Made public, usable with a free licence and without proprietary components.
- Resulting from an incision, puncture or any other process by which the skin no longer protects an internal part of the body.
- To make something accessible or allow for passage by moving from a shut position.
- To make (an open space, etc.) by clearing away an obstacle or obstacles, in order to allow for passage, access, or visibility.
- To bring up, broach.
- To enter upon, begin.
- To spread; to expand into an open or loose position.
- To make accessible to customers or clients.
- To start (a campaign).
- To become open.
- To begin conducting business.
- To begin a side's innings as one of the first two batsmen.
- To bet before any other player has in a particular betting round in a game of poker.
- To reveal one's hand.
- (of a file, document, etc.) To load into memory for viewing or editing.
- To disclose; to reveal; to interpret; to explain.
- (with the) Open or unobstructed space; an exposed location.
- (with the) Public knowledge or scrutiny; full view.
- A defect in an electrical circuit preventing current from flowing.
- A sports event in which anybody can compete