Wheeler is the first of the competitors on the Youth Club roster (7)
I believe the answer is:
'wheeler' is the definition.
(someone who travels around on wheels)
'the first of the competitors on the youth club roster' is the wordplay.
'the first of' says to take the initial letters.
'on' is a charade indicator (letters next to each other).
'the youth club' becomes 'yc' (this could be a standard abbreviation of which I'm unaware).
'roster' becomes 'list' (I've seen this before).
The first letter of 'competitors' is 'c'.
'is' is the link.
Can you help me to learn more?
(Other definitions for cyclist that I've seen before include "(Two-wheeled) rider" , "Person using two-wheeled transport" , "Person on a two-wheeler" , "Bike user" , "Sportsperson on two wheels" .)