Person trying to find Home Counties house (8)
I believe the answer is:
searcher
'house' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'person trying to find home counties' is the wordplay.
I cannot really see how this works, but
'person' could be 'archer' (archer is a kind of person) and 'archer' is found within the answer.
'home counties' could be 'se' (Home Counties in the South East of England) and 'se' is present in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for searcher that I've seen before include "One looking for something" , "One seeking something" , "Hunter" , "One may be Googling" , "One on a quest" .)