Crossword Genius

Realised it had a novel sound (4)

Ross

I believe the answer is:

knew

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

'realised it' is the definition.
I can't judge whether this definition defines the answer.

'a novel sound' is the wordplay.
'a novel' becomes 'new' (I've seen this before).
'sound' indicates a 'sounds like' (homophone) clue.
'new' sounds like 'KNEW'.

'had' acts as a link.

Can you help me to learn more?

(Other definitions for knew that I've seen before include "Recognised" , "Was familiar with" , "Acknowledged" , "Was cognisant or aware of" , "Distinguished" .)

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