Dictator's talented younger brother bumped off (4)

I believe the answer is:

abel

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'dictator's' is the definition.
Both the answer and definition are singular nouns.
Perhaps they are linked in a way I don't understand?

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

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(Other definitions for abel that I've seen before include "The first known murder victim" , "Gardener's son" , "character in the Bible" , "tragic figure" , "First shepherd" .)

I've seen this clue in The Independent.

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