Second person to sound like a sheep (3)
I believe the answer is:
Here is my best explanation:
'second person' is the definition.
(I've seen this before)
'sound like a sheep' is the subsidiary indication.
'sound like' shows a homophone (sound like).
'a sheep' becomes 'ewe' (ewe is a kind of sheep).
'ewe' sounds like 'you'.
'to' is the link.
(Other definitions for you that I've seen before include "Second person pronoun", "The solver", "Thee", "The audience as addressed by speaker", "My solver", "My solvers in general", "Thou", "Neither me, nor him", "Second-person pronoun" and "Pronoun".)