Crossword Genius

Surplus sound of rock group? (2,6)

Ross

I believe the answer is:

in excess

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

'sound of rock group?' is the definition.
Both the answer and definition are adverbs. Perhaps there's a link between them I don't understand?

'surplus' is the wordplay.
I cannot really understand how this works, but
'surplus' could be 'excess' (synonyms) and 'excess' is found in the answer.
The remaining letters 'in' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Another definition for in excess that I've seen is " Over the top".)

I've seen this clue in 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.