Finally, tea is drunk we had requested (5)
I believe the answer is:
asked
'requested' is the definition.
('ask' can be a synonym of 'request')
'finally tea is drunk we had' is the wordplay.
'finally' suggests the final letters.
The final letters of 'tea is drunk we had' are 'ASKED'.
(Other definitions for asked that I've seen before include "Demanded" , "Requested" , "Made a request" , "Put a question to" , "Inquired" .)