Crossword Genius

Expertise lacking for the audience in what way? (7)

Ross

I believe the answer is:

know-how

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(Other definitions for know-how that I've seen before include "Technique, expertise" , "Ingenuity - experience" , "Practical knowledge or skill" , "Ingenuity - aptitude - skill" , "Specialised skill" .)

I've seen this clue in The Telegraph.
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