The most common and most likely answer to this crossword clue is the 3 plus 4 letter word DAY TRIP
I've seen this crossword clue in The Daily Telegraph
D
A
Y
T
R
I
P
More clues leading to the result DAY TRIP
- Transfer tardy on ridiculously cheap excursion
- Outing may produce pay dirt
- Duke meets party I arranged for short excursion
- An excursion that provides pay dirt, possibly
- Party I’d organised for excursion
- Daughter always to slip up making brief excursion
- Outing Democrat — one in new party
- Party I’d assembled for outing
- Spooner reportedly to assess salad dressing for picnic?
- Unusual tray covered with party food gets short outing
Buddy explains!

The straight part
We know that "Outing" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case outing = day 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.