Coat with flour (6)
I believe the answer is:
dredge
'coat with flour' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for dredge that I've seen before include "Clear a channel" , "Clean mud as from silted harbour" , "Dig out mud from (waterway)" , "Remove material from a channel or riverbed" , "Dig up mud from river or canal bed" .)