Special skill or knowledge (9)

I believe the answer is:

expertise

'special skill or knowledge' is the definition.
(I've seen this before)

This is all the clue.

(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 Irish Times and the Sydney Morning Herald.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.