Point during drink, and talk louder (5,2)
I believe the answer is:
speak up
'talk louder' is the definition.
(to speak up is to raise one's voice)
'point during drink' is the wordplay.
'point' becomes 'peak' (synonyms).
'during' indicates putting letters inside.
'drink' becomes 'sup' (to sup is to drink).
'peak' inserted into 'sup' is 'SPEAK UP'.
'and' acts as a link.
(Other definitions for speak up that I've seen before include "State one's opinions boldly" , "Raise your voice - can't hear you" , "augment volume" , "Say things more loudly" , "Make oneself heard" .)