Sounds as if false notes may come from them (5)
I believe the answer is:
lyres
'sounds' is the definition.
Although both the answer and definition are plural nouns, I cannot see how they can define each other.
'if false notes may come from them' is the wordplay.
I cannot quite see how this works, but
'notes' could be 'res' (more than one re, a musical note) and 'res' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
'as' acts as a link.
Can you help me to learn more?
(Another definition for lyres that I've seen is " Ancient Greek harps".)