The most common and most likely answer to this crossword clue is the 5 letter word RIDES
I've seen this crossword clue in The Guardian
R
I
D
E
S
More clues leading to the result RIDES
- Kept in reserve, passport possibly for travels
- Travels free — express empty
- Goes up to deliver a couple of points
- Spins and dries, perhaps
- Gets lift in Kalahari desert
- Bumpy areas not good for journeys
- Caesar’s last day in Rome goes on
- Comes through Queen’s fateful date
- Is taken aback by a fair’s attractions
- Gets up with a change of heart, and travels
Buddy explains!

The straight part
We know that "goes on" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case goes on = rides.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 RIDES mean?
RIDES noun- An instance of riding.
- A vehicle.
- An amusement ridden at a fair or amusement park.
- A lift given to someone in another person's vehicle.
- A road or avenue cut in a wood, for riding; a bridleway or other wide country path.
- A saddle horse.
- A person (or sometimes a thing or a place) that is visually attractive.
- In jazz, to play in a steady rhythmical style.
- To transport oneself by sitting on and directing a horse, later also a bicycle etc.
- To be transported in a vehicle; to travel as a passenger.
- (chiefly US and South Africa) To transport (someone) in a vehicle.
- Of a ship: to sail, to float on the water.
- To be carried or supported by something lightly and quickly; to travel in such a way, as though on horseback.
- To traverse by riding.
- To convey, as by riding; to make or do by riding.
- To support a rider, as a horse; to move under the saddle.
- To mount (someone) to have sex with them; to have sexual intercourse with.
- To nag or criticize; to annoy (someone).
- Of clothing: to gradually move (up) and crease; to ruckle.
- To rely, depend (on).
- Of clothing: to rest (in a given way on a part of the body).
- To play defense on the defensemen or midfielders, as an attackman.
- To manage insolently at will; to domineer over.
- To overlap (each other); said of bones or fractured fragments.
- To monitor (some component of an audiovisual signal) in order to keep it within acceptable bounds.
- In jazz, a steady rhythmical style.