The man concerning this place (4)
I believe the answer is:
here
'this place' is the definition.
(here in this location)
'the man concerning' is the wordplay.
'the man' becomes 'he' (he refers to a man).
'concerning' becomes 're' (both can mean on a particular topic).
'he'+'re'='HERE'
(Other definitions for here that I've seen before include "Present - at this point" , "Hither" , "At this stage" , "final clue?" , "Present; I say!" .)