The most common and most likely answer to this crossword clue is the 4 plus 3 letter word TIME OUT
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The straight part
We know that "gap year, perhaps" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case gap year, perhaps = time out.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 TIME OUT mean?
TIME OUT noun- A short break in the action of a sport, for substitution, consultation, etc.
- A break from a tense, heated or stressful situation (often enforced, sometimes as a disciplinary measure); a cooling-off period.
- (communication) The intentional ending of an incomplete task after a time limit considered long enough for it to end normally.