Dexterity is unimportant for the audience (7)

I believe the answer is:

sleight

I'm a little stuck... Click here to teach me more about this clue!

'dexterity' is the definition.
(I know that dexterity can be written as sleight)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for sleight that I've seen before include "craft" , "Conjuror uses this" , "Manual dexterity" , "distraction?" , "Skilful deception" .)

I've seen this clue in The Daily Express.

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.