The most common and most likely answer to this crossword clue is the 10 letter word SOMERSAULT
I've seen this crossword clue in The Daily Telegraph
S
O
M
E
R
S
A
U
L
T
More clues leading to the result SOMERSAULT
- Move acrobatically, hearing of a certain attack
- Convoluted spring is two seasons, by the sound of it
- In complete reversal season broadcast twice
- Mao’s result creates policy reversal
- Turnover from two seasons, say
- Soundly season, repeat, roll …
- Acrobatic feat in what sounds like two seasons
- During which one is almost sure to be turned over?
- Tumbler’s needed for this cocktail of rum, sloes, and a dash of tonic
- Gymnastic feat in heyday heard by experienced sailor on radio
Buddy explains!

The straight part
We know that "Gymnastic feat" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case gymnastic feat = somersault.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 SOMERSAULT mean?
SOMERSAULT noun- Starting on one's feet, an instance of rotating one's body 360 degree while airborne or on the ground, with one's feet going over one's head.
- To perform a somersault.