This ruler won't give an inch (8)

I believe the answer is:

dictator

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'this ruler' is the definition.
(dictator is a kind of ruler)

I don't understand how the remainder of the clue works.

(Other definitions for dictator that I've seen before include "Hitler was one, like Stalin and Franco" , "One ordering" , "All-powerful ruler" , "Absolute ruler (Great in Chaplin film)" , "person in charge? Absolutely!" .)

I've seen this clue in The Telegraph and The Globe and Mail.

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