Crossword Genius

Rap-grind-core CD (9)

Ross

I believe the answer is:

recording

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

'cd' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I can't see?

'rap-grind-core' is the wordplay.
'grind-core' anagrams to 'RECORDING'.
Though, I'm not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for recording that I've seen before include "Taping" , "Eg, something on CD" , "Transcription" , "Writing down or registering electronically" , "Tape" .)

I've seen this clue in the Sydney Morning Herald.
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