Wicked piece of gross incompetence (3)

I believe the answer is:

sin

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

'wicked piece' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

'of gross incompetence' is the wordplay.
'of' indicates a hidden word.
'SIN' is hidden in the letters of 'gross incompetence'.

Can you help me to learn more?

(Other definitions for sin that I've seen before include "Immorality" , "Go astray" , "Lapse against moral law" , "Behave badly" , "Err" .)

I've seen this clue in the Evening Standard.

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.