Answer:

dredged

Answer	Crossword Clue
DREDGED	Deepened, in a way
DREDGED	Saved from obscurity, with "up"
DREDGED	Dragged (up)

DREDGED	Cleared a channel
DREDGED	Cleared out, in a way
DREDGED	Unearthed, with "up"
DREDGED	Scraped the bottom of
DREDGED	Brought (up), as from the distant past
DREDGED	Dipped in flour
DREDGED	Unearthed (with "up")