Crossword Genius

Measure of authority (4)

Ross

I believe the answer is:

rule

This clue is a double definition.

'measure' is the first definition.
(I know that rule is a type of measure)

'authority' is the second definition.
(I've seen this in another clue)

'of' is the link.

(Other definitions for rule that I've seen before include "Lure with regulation" , "Control using lure." , "Control; printed line" , "Strip" , "Determination" .)

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