Run down deliberately (7)
I believe the answer is:
trickle
This might be a double definition.
'run' is the first definition.
(trickling is a kind of running)
'down deliberately' is the second definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
Can you help me to learn more?
(Other definitions for trickle that I've seen before include "Gentle flow (of liquid?)" , "sluggish stream" , "Flow slowly in drops" , "A very thin flow of liquid" , "A thin slow stream of water" .)