Topless protester, one taking a bow? (6)
I believe the answer is:
archer
'one taking a bow?' is the definition.
(person using a bow and arrow)
'topless protester' is the wordplay.
'topless' means to remove the first letter.
'protester' becomes 'marcher'.
'marcher' with its first letter removed is 'ARCHER'.
(Other definitions for archer that I've seen before include "One uses bows and arrows" , "Missile launcher" , "ex-con" , "A 19 lord - old soldier" , "Jeffrey, bowman?" .)