Stock regularly including gold choker (4)
I believe the answer is:
torc
'choker' is the definition.
(I've seen this before)
'stock regularly including gold' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'including' indicates putting letters inside.
'gold' becomes 'or' ('or' is the heraldic name for gold).
The alternating letters of 'stock' are 'tc'.
'tc' enclosing 'or' is 'TORC'.
(Other definitions for torc that I've seen before include "Metal armband worn by Ancient Britons" , "ancient necklace" , "One gets into a twist" , "Choker" , "Metallic neck ornament" .)