How to list songs with lyrics first?

Is there a way to sort files by lyrics. I mean songs with lyrics first and the other at the end?

Yes.
You can add a column in the File List with this Value:
%unsyncedlyrics%
Then you can sort the File List content (your tracks) by clicking on this column header and get the list sorted by tracks with or without lyrics.

You would have to find out whether you have filled UNSYNCEDLYRICS or a different field (e.g. LYRICS) with the text.
Wouldn't a filter be much more efficient - I mean what is the benefit to have all the lyrics that start with "A" first?

So, try
%unsyncedlyrics% MISSING
to display all files without lyrics.
Or, if you may have text in either field:
%unsyncedlyrics% MISSING AND %lyrics% MISSING

Thanky you very much. Works fine