Ogreish thug reels, regularly making signs (8)
I believe the answer is:
gestures
'signs' is the definition.
(gesture is a kind of sign)
'ogreish thug reels regularly' is the wordplay.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
'ogreish'+'thug'+'reels'='ogreishthugreels'
The alternate letters of 'ogreishthugreels' are 'GESTURES'.
'making' is the link.
(Other definitions for gestures that I've seen before include "Make signs with hand movements" , "Expressive movements" , "Motions that express thoughts" , "waves" , "Movements to express something" .)