Crossword Genius

Wrong about a piece of jewellery (7)

Ross

I believe the answer is:

earring

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

'a piece of jewellery' is the definition.
(I've seen this before)

'wrong about' is the wordplay.
I cannot really see how this works, but
'about' could be 'a' (abbreviation in Chambers) and 'a' is found within the answer.
'wrong' could be 'erring' (I've seen this before) and 'erring' is present in the leftover letters.
No letters remain.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for earring that I've seen before include "Otic adornment" , "Decoration" , "Aural pendant" , "Lobe pendant" , "Stud, perhaps, or a drop?" .)

I've seen this clue in The Guardian and The Times.
Want a hint initially instead of a full solution? Install my app