Game speculator (4)
I believe the answer is:
stag
I believe this is a double definition.
'game' is the first definition.
(stags are game in the hunting sense)
'speculator' is the second definition.
(I've seen this before)
(Other definitions for stag that I've seen before include "Adult male deer, often with antlers" , "without female escort" , "Antlered beast" , "involving men" , "This party is for men only" .)