Set apart, ten gears for cycling (8)
I believe the answer is:
estrange
'set apart' is the definition.
(thesaurus)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for estrange that I've seen before include "turn away?" , "Cause to become unfriendly using reagents" , "split up?" , "Make bad friends with sergeant" , "Lose friendship" .)