Answer: tanking

AnswerCrossword Clue
TANKINGGoing down in flames
TANKINGDoing horribly
TANKINGRuler on a beach?
TANKINGGoing down in the rankings, say
TANKINGGoing south
tankinga defeat
tankingFill the tank of a vehicle with fuel
tanking(in sports) Deliberately lose or fail to finish (a game)
tankingDrink heavily; become drunk
tankingFail completely, esp. at great financial cost