When duke goes, intimidate family member (4)

I believe the answer is:

aunt

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'family member' is the definition.
(sister of a parent)

I can't explain the remainder of the clue.

(Other definitions for aunt that I've seen before include "Family member" , "Close relative" , "Charley's ___ , farce staged in London in 1892, revived and adapted ever since" , "Tuna for the odd relative" , "Parent's female sibling" .)

I've seen this clue in The Sun.

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