quid pro quo

BARTER
List of words for the clue quid pro quo from the crossword:
NERO SWAP CHAW SWAPS CHEW STATUS TRADE SWOP CPA RETAINER CONSIDERATION EMIL POUND REDS ASIS INTERCHANGE EXCHANGE AMISS RATA
WordClue
UPSIDEpro, plus
EMPERORCaracalla or Nero
ADVANTAGEpro, upside
MERCURYquicksilver, hydrargyrum
MUMBLEquiet or unintelligible vocalization