Crossword Genius

Sharpen weak sounds (4)

Ross

I believe the answer is:

whet

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

'sharpen' is the definition.
(I know that whet is a more specific form of the action sharpen)

'weak sounds' is the wordplay.
'weak' becomes 'w' (physics symbol as in W-boson).
'sounds' becomes 'het' (I can't explain this - if you can you should give a lot more credence to this answer).
'w'+'het'='WHET'

Can you help me to learn more?

(Other definitions for whet that I've seen before include "Arouse" , "Sharpen the blade of (a tool/weapon)" , "Sharpen by rubbing" , "Stimulate (appetite)" , "Make keen" .)

I've seen this clue in The Sun.
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.