Deserting one's allegiance or duty (8)

I believe the answer is:

disloyal

(Other definitions for disloyal that I've seen before include "Not faithful, treacherous" , "Unfaithful or unpatriotic" , "Deserting one's allegiance" , "The opposite of 11 Across" , "Treasonable or treacherous" .)

I've seen this clue in The Mirror.

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