And I'll agree with all of you
....that it's nothing to be concerned about.
Like I said, if you isolate just the vocal of a lot of singers that are good singers, you can hear odd little mouth noises. They could be buzzing, clicking, fffffft type stuff...etc.
Add the vocal to the mix, and then don't focus on that tiny bit of mouth noise just 'cuz you know it's there. Listen to it like anyone else would listen to a song. It won't be noticeable.
It's like guitar string noise. There's always some, and there's always an acceptable/natural level that doesn't really ruin things.
That said....and not to leave you hanging...
If you really feel compelled to do something about it....
...(and it's a good EQ technique exercise)....you can "spot edit" only the points on the track where it's most noticable....but I wouldn't screw the whole track up with correction.
If you don't like the result....UNDO.
Find a spot where it's loudest, cut the track front & back of that spot, then use a parametric with a narrow Q and hard cut. Put a loop region over that slice of the track, play the loop and then move the parametric cut band until you find the EQ point where it removes the noise the most. I would guess it's up there near the "SSSSSSS" zone of the vocal, but it can be tricky and there might also be a harmonic below it....which is why you don't want to screw with the whole track.
Once you hit the EQ spot where the cut removes most of the noise.....put some back.
IOW...boost it back up some. Try to take off as little as possible. Maybe remove only 25% of the noise. If you cut it too hard, it will sound weird. To use a coined term....just
kiss it lightly with the cuts.
Anyway...let your ears be your guide....but really, at most you might want to do that only to a few of the worst spots on the track, and leave the rest alone. Also, when you do the EQ cuts....always A/B with the whole mix, and then cut only enough for it not to be noticable WITH the mix. Don't just solo the vocal when you make the cuts.
