Crossword Genius

Special skill or knowledge (9)

Ross

I believe the answer is:

expertise

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">special skill or knowledge</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>

(Other definitions for expertise that I've seen before include "professionalism" , "Adroitness" , "Mastery, proficiency" , "Thorough knowledge" , "Technical skill" .)

I've seen this clue in the Sydney Morning Herald and The Irish Times.
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