Flow slowly (7)
I believe the answer is:
trickle
'flow slowly' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for trickle that I've seen before include "Small flow (of liquid)" , "A series of drops" , "Flow in thin drops" , "Flow in a slow thin stream" , "Gentle flow (of liquid?)" .)