Let's raise second and third glass of beer (6)
I believe the answer is:
stella
'beer' is the definition.
(Stella Artois)
'let's raise second and third glass' is the wordplay.
'raise' is a reversal indicator.
'second and' becomes 'l' (I can't explain this - if you can you should give a lot more credence to this answer).
'third glass' becomes 'a' (3rd letter of 'glass').
'lets' back-to-front is 'stel'.
'stel'+'l'+'a'='STELLA'
'of' is the link.
Can you help me to learn more?
(Other definitions for stella that I've seen before include "Girl's name meaning star" , "lady?" , "____ McCartney, fashion designer" , "girl!" , "Swift alias for Esther" .)