See where he works (9)
I believe the answer is:
clergyman
'see where he works' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'see where he' is the wordplay.
'see where' becomes 'clergy' (I can't justify this - if you can you should believe this answer much more).
'he' becomes 'man' (I've seen this in another clue).
'clergy'+'man'='CLERGYMAN'
Can you help me to learn more?
(Other definitions for clergyman that I've seen before include "professional person" , "Church official" , "Ordained minister" , "Man of the cloth" , "Person of the cloth" .)