The most common and most likely answer to this crossword clue is the 9 letter word FREESTYLE
F
R
E
E
S
T
Y
L
E
More clues leading to the result FREESTYLE
- Feel tyres must be changed for wet sort of race
- Stroke releases part of roof, so I’m told
- Order: eyes left? right? whichever way you like?
- Stroke loosens part of roof, say
- Steer around south of France, see upcoming type of race
- Crawl to the finish in such an event
- Doffs cap reportedly any way you like
- Complimentary manner used at the swimming gala?
- There’s no set way to win such races
- Unstructured Flyer tees off
Buddy explains!

The straight part
We know that "Unstructured" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case unstructured = freestyle.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 FREESTYLE mean?
FREESTYLE noun- A sports event where competitors can choose their own method of participation.
- A form of rapping in which the emcee makes up lyrics while rapping.
- Modifying programming code in production and quality assurance environments, violating the existing procedures for deploying it.
- (especially in rap music) To improvise one's own style; to ad-lib.
- To improvise one's dance moves; dance freely.
- An alpine skiing discipline comprising aerials, moguls, cross, half-pipe and slopestyle as part of the Winter Olympics.