Crossword Genius

They sound in favour and are made amorously (4)

Ross

I believe the answer is:

eyes

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

'they sound' is the definition.
The answer and definition can be both related to thinking as well as being singular nouns.
Maybe there's an association between them I don't understand?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for eyes that I've seen before include "Ophthalmologist's speciality" , "Parts of needles" , "front part of ship" , "Are they made to suggest possible date" , "They have pupils" .)

I've seen this clue in The Irish News.
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