Sings at home with wrong notes (7)
I believe the answer is:
intones
'sings' is the definition.
(intoning is a kind of singing)
'home with wrong notes' is the wordplay.
'home' becomes 'in' ('he's home' can mean 'he's in').
'with' is a charade indicator (letters next to each other).
'wrong' indicates anagramming the letters.
'notes' with letters rearranged gives 'tones'.
'in'+'tones'='INTONES'
'at' acts as a link.
(Other definitions for intones that I've seen before include "Recites in a chanting voice" , "Chants" .)