Possible Clues:

• You'd expect this type of person to get a rise out of broker
• You'd expect this sort of person to get a rise out of broker
• One who circumvents hurdles when discussing terms?
• One who bargains on a tiger to be tamed
• Who once regularly secured one a rise?
• One may circumvent obstacles to get on air trip
• One in discussions to reach an agreement
• One making deal
• Seeker of compromise
• One trying to agree a compromise