Arrange sit-ins to make repeated demands (6)
I believe the answer is:
insist
'to make repeated demands' is the definition.
I can't tell whether this defines the answer.
'arrange sit-ins' is the wordplay.
'arrange' indicates an anagram.
'sit'+'ins'='sitins'
'sitins' is an anagram of 'INSIST'.
Can you help me to learn more?
(Other definitions for insist that I've seen before include "Demand firmly" , "Maintain strongly" , "Urge" , "Declare or demand emphatically" , "Continue to assert, maintain" .)