Millions abandoning videoconferencing system for drinks (4)
I believe the answer is:
teas
'for drinks' is the definition.
(tea is a kind of drink)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for teas that I've seen before include "Hot drinks" , "Beverages from leaves" , "Afternoon meals" , "Beverage made by steeping leaves in water" .)