That chap has got on at this point (4)
I believe the answer is:
here
'at this point' is the definition.
(here means in this place)
'that chap has got on' is the wordplay.
'that chap' becomes 'he' ().
'has got' is a charade indicator (letters next to each other).
'on' becomes 're' (regarding).
'he'+'re'='HERE'
(Other definitions for here that I've seen before include "In this place - present" , "To hand" , "Present; I say!" , "Present - at this point" , "The present location" .)