OK to scoff but possible His Majesty will abdicate? (6)

I believe the answer is:

edible

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'ok to scoff' is the definition.
(edible can mean alright to eat)

I cannot understand how the rest of the clue works.

(Other definitions for edible that I've seen before include "Fit for eating" , "hoping dinner will be this?" , "Suitable for use as food" , "It's all right to scoff" , "Fit to be eaten" .)

I've seen this clue in The Times.

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