Do remove the sit-in demonstrator (5,3)
I believe the answer is:
carry out
'do' is the definition.
(I know that carry out is a type of effect)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for carry out that I've seen before include "Takeaway (Sc. & US)" , "Take away" , "Remove - execute" , "Make good" , "Put into practice, accomplish" .)