Crossword Genius

Union foe (4)

Ross

I believe the answer is:

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">union foe</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>

(Other definitions for scab that I've seen before include "that blocks cut" , "he refuses to come out" , "He's not out" , "Dried crust on wound" , "cover" .)

I've seen this clue in the Universal.
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