Answer: quicksilver

AnswerCrossword Clue
QUICKSILVERMercury
QUICKSILVEROnly metal that's liquid at room temperature
QUICKSILVERFree-flowing metal
QUICKSILVERMercury alias
QUICKSILVERLiquid of sorts.
QUICKSILVERThermometer contents
QUICKSILVERFast money?
QUICKSILVERLone Ranger's "Giddyap"?
QUICKSILVEREpitome of elusiveness
quicksilverThe liquid metal mercury
quicksilveran old name for mercury / to coat with quicksilver
quicksilverUsed in similes and metaphors to describe something that moves or changes very quickly, or that is difficult to hold or contain