The most common and most likely answer to this crossword clue is the 9 letter word HANDLEBAR
I've seen this crossword clue in The Guardian
H
A
N
D
L
E
B
A
R
More clues leading to the result HANDLEBAR
- Animal trainer clamps front of bridle with a part for rider to grip
- Fragment of Messiah heard, part of a cycle
- Help the French ban kind of moustache
- What one should put brakes on pub staff do
- Part of cycle lane, hard ground comprising bitumen, primarily
- English following height and length restriction for bicycle part
- Dog-trainer holding top borzoi with a moustache
- What pub manager might do to get this type of moustache?
- Sort of moustache Abner had rearranged around front of lip
Buddy explains!

The straight part
We know that "part of a cycle" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case part of a cycle = handlebar.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 HANDLEBAR mean?
HANDLEBAR noun- The bar used to steer a bicycle, motorbike, or similar vehicle, usually used in the plural.