Wheeler's modest loveless description of low-level celebrity? (7)
I believe the answer is:
cyclist
'wheeler's' is the definition.
(someone who travels around on wheels)
'loveless description of low-level celebrity?' is the wordplay.
'loveless' becomes 'cy' (I can't justify this - if you can you should give a lot more credence to this answer).
'description of low-level celebrity?' becomes 'Clist' (people less important than A-listers).
'cy'+'clist'='CYCLIST'
'modest' is the link.
I am not very happy about this link. It may be part of another bit of the clue.
(Other definitions for cyclist that I've seen before include "He rides a two-wheeled vehicle" , "One on a bike" , "Person using two-wheeled transport" , "Biker" , "Bike rider" .)