The most common and most likely answer to this crossword clue is the 9 letter word EXCURSION
I've seen this crossword clue in The Guardian
E
X
C
U
R
S
I
O
N
More clues leading to the result EXCURSION
- Former copper working after repetitive strain injury and trip
- About ninety in euros converted -- enough for trip
- Trip when dancing on cruise, having snatched a kiss
- Sally‘s old dog is lifting leg
- Cousin Rex organised trip
- Reformed scoundrel is returning on trip
- Tendon injury to leg after old copper’s trip
- Old dog is back on tour
- Outing former partner almost swearing about love
- Outing scoundrel after vote in revolutionary racket
Buddy explains!

The straight part
We know that "Sally" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case sally = excursion.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 EXCURSION mean?
EXCURSION noun- A brief recreational trip; a journey out of the usual way.
- A wandering from the main subject: a digression.
- A deviation in pitch, for example in the syllables of enthusiastic speech.
- To go on a recreational trip or excursion.