Answer:

redouble

AnswerCrossword Clue
REDOUBLEBridge table action
REDOUBLEA return bid at bridge.
REDOUBLEBridge call.
REDOUBLEBridge bid.
REDOUBLEBridge call
REDOUBLEConfident bridge bidder's call
REDOUBLEDuplicate an effort again