Put on a wheel race (9)
I believe the answer is:
doncaster
'race' is the definition.
Both the answer and definition are singular nouns.
Perhaps they are linked in a way I don't understand?
'put on a wheel' is the wordplay.
'put on' becomes 'don' (as in donning or putting on an item of clothing).
'a wheel' becomes 'caster' (small wheel attached to a large object).
'don'+'caster'='DONCASTER'
Can you help me to learn more?
(Other definitions for doncaster that I've seen before include "northern town" , "Town of South Yorkshire" .)