The most common and most likely answer to this crossword clue is the 6 letter word GAMBOL
I've seen this crossword clue in The Guardian
G
A
M
B
O
L
More clues leading to the result GAMBOL
- Caper that sounds like something risky
- Lark about with doctor in prison
- Launch publication around spring
- Caper has doctor incarcerated?
- Caper gets student doctor locked up
- Frolic to take a punt, we’re told
- Caper, risky venture by the sound of it
- Frisk doctor entering prison
- Frolic in punt, we hear
- Medical man imprisoned for harmless frolic
Buddy explains!

The straight part
We know that "Caper" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case caper = gambol.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 GAMBOL mean?
GAMBOL noun- An instance of running or skipping about playfully.
- An instance of more general frisking or frolicking.
- To move about playfully; to frolic.
- To do a forward roll.