Musixmatch is, in my opinion, one of the better and more serious of the myriad lyric providers. Unfortunately they are still not on the Lyrics whitelist despite people asking for it since 2011.
Here is what looks like the most relevant proposal ticket, give it a vote if like me you would like to be able to add lyrics links from MM:
https://tickets.metabrainz.org/browse/MBS-3643