Ancient race a jockey finished somewhere in Wales (8)
I believe the answer is:
anglesey
'jockey finished somewhere in wales' is the definition.
The definition suggests a singular noun which matches the answer.
'ancient race a' is the wordplay.
I cannot really understand how this works, but
'a' could be 'an' and 'an' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for anglesey that I've seen before include "British island known locally as Ynys Mon" , "Island off NW tip of Wales" , "Island of North Wales" , "Welsh island" , "Welsh county" .)