Flow is feeble, we hear (4)
I believe the answer is:
pour
'flow' is the definition.
(I know that pour is a type of flow)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for pour that I've seen before include "Pelt - decant" , "16 [CATS AND DOGS]" , "Cause to flow in a stream" , "Teem" , "Serve liquid" .)