Spook lies regularly about Eastern European (4)
I believe the answer is:
pole
'eastern european' is the definition.
'spook lies regularly' is the wordplay.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
'spook'+'lies'='spooklies'
The alternating letters of 'spooklies' are 'POLE'.
'about' is the link.
(Other definitions for pole that I've seen before include "Man from Warsaw" , "Punt propeller" , "Staff" , "location where it is always very cold" , "One of two opposites" .)