xml query with sql

I have an XML column:

<xmlList> 
   <XMLEntity> 
      <sug>ACHER</sug>
   </XMLEntity>

  <XMLEntity> 
      <sug>DOA</sug>
   </XMLEntity>
</xmlList>

In this way I get just the sug node:

SELECT XMLSERIALIZE(XMLQUERY ('//xmlList/XMLEntity/sug' passing 
KTOVET ) as char large object) as XXX 
FROM "TABLE"  

How can I get the sug nodes where its value is "ACHER"?