The most common and most likely answer to this crossword clue is the 5 plus 4 letter word ROUND TRIP
I've seen this crossword clue in The Times
R
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More clues leading to the result ROUND TRIP
- Drinks and drugs experience going both ways
- Journey to the bar and back?
- Complete journey on bullet train?
- Stumble carrying drinks for journey there and back
- Stumble after a few drinks: ultimately it gets us nowhere!
- The Circle Line is!
- Circumnavigation?
- Take a tumble supporting cycle tour
- About to fall on a circular tour
- Ticket there and back torn up, I’d moved south of Russian capital
Buddy explains!

The straight part
We know that "Journey to the bar and back?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case journey to the bar and back? = round trip.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 ROUND TRIP mean?
ROUND TRIP noun- A trip from one destination to another and then returning to the starting location.