Answer: dynamicduo

AnswerCrossword Clue
DYNAMICDUOLaw enforcers since 1940
DYNAMICDUOBatman and Robin, with "The"
DYNAMICDUONickname for Batman and Robin
DYNAMICDUOBatman and Robin, e.g.
DYNAMICDUOBatman and Robin
DYNAMICDUONickname for a high-achieving couple
DYNAMICDUOLongtime nickname in comics