Regularly cut a green near field (5)
I believe the answer is:
arena
'field' is the definition.
(I know that field can be written as arena)
'regularly cut a green near' is the wordplay.
'regularly cut' indicates alternate letters (letters removed at regular intervals).
'a'+'green'+'near'='agreennear'
The alternating letters of 'agreennear' are 'ARENA'.
(Other definitions for arena that I've seen before include "Field of combat" , "Enclosure for sports etc." , "An era (anag.)" , "combat zone" , "domain" .)