Rain heavily (4)
'rain heavily' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for teem that I've seen before include "(Of rain) pour down" , "Pullulate" , "Abound, swarm with" , "stream" , "Abound - pour" .)
'rain heavily' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for pour that I've seen before include "Serve liquid" , "Give out liquid" , "Cause to flow or rain heavily" , "Cause to flow in a stream" , "Teem" .)