Man, say, insulted on a regular basis (4)
I believe the answer is:
isle
'man say' is the definition.
(Isle of Man)
'insulted on a regular basis' is the wordplay.
'on a regular basis' means one should take alternating letters.
The alternating letters of 'insulted' are 'ISLE'.
(Other definitions for isle that I've seen before include "Lies about small land mass." , "Could be Man" , "Hawaii, perhaps" , "Eg, Sheppey" , "See 11 Across" .)