Drink cappuccinos or cordatos? Only Americanos, primarily (5)
I believe the answer is:
cocoa
'drink' is the definition.
(cocoa is a kind of drink)
'cappuccinos or cordatos? only americanos primarily' is the wordplay.
'primarily' suggests taking the first letters.
The first letters of 'cappuccinos or cordatos only americanos' is 'COCOA'.
(Other definitions for cocoa that I've seen before include "Powder from cacao beans" , "Chocolaty drink" , "Reddish brown" , "Late-night drink" , "Lightish brown colour of a drink" .)