Taxing cash after banks rejected gold put up by America (7)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

“money”(cash) minus its 1st and last letters ( after banks rejected ) + reversal of ( … put up , in a down clue) OR(the colour, gold in heraldry) plus ( by ) US(abbrev. for “United States”/America).