Answer:

goldminer

Answer	Crossword Clue
GOLDMINER	Seeker of certain precious materials
GOLDMINER	One who works with pans
GOLDMINER	An "Argonaut."

GOLDMINER	Certain digger
GOLDMINER	Clementine's pa, for one
GOLDMINER	Klondike hopeful
GOLDMINER	One for whom a flash in the pan is a good thing