Flow out slowly
I believe the answer is:
seep
'flow out slowly' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for seep that I've seen before include "Leak gradually" , "Leak slowly, ooze" , "Ooze, percolate" , "Trickle through slowly" , "Flow or leak slowly" .)