The last thing an extremist wants? (3)
I believe the answer is:
end
'the last' is the definition.
(I've seen this in another clue)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for end that I've seen before include "Completion" , "Closure" , "death" , "ambition" , "Finish; goal" .)