Sprinkle with flour (6)
I believe the answer is:
dredge
'sprinkle with flour' is the definition.
(sprinkle food with powder like sugar or flour)
This is the entire clue.
(Other definitions for dredge that I've seen before include "Dig out mud (from a river, harbour, etc)" , "Clean mud as from silted harbour" , "Dig up mud from river or canal bed" , "Scoop out (bed of harbour, river, etc.)" , "Clear (riverbed)" .)