Serve tea (4)
I believe the answer is:
pour
'serve tea' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for pour that I've seen before include "to drop, when it's heavy" , "Dispense (e.g. tea)" , "Dispense tea - rain hard" , "Pelt - decant" , "Cause to flow in a stream" .)