1,000 determine to avoid initial riot control area (6)
I believe the answer is:
kettle
'avoid initial riot control area' is the definition.
I can't tell whether this definition defines the answer.
'1000 determine' is the wordplay.
'e000' becomes 'k' (synonyms).
'determine' becomes 'ettle' (I am not sure about this - if you are sure you should believe this answer much more).
'k'+'ettle'='KETTLE'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for kettle that I've seen before include "Spouted vessel" , "Kitchen boiler?" , "A pretty - of fish" , "Kitchen utensil and type of drum" , "One called black by pot" .)