hash out

【原文】
Those talks have led to a forbearance agreement with the creditors designed to give Quiznos more time to hash out a deal, Quiznos Chief Executive Stuart Mathis said in a memo Wednesday to franchisees that was reviewed by The Wall Street Journal.

【単語の意味（日本語）】
（問題・困難など）をじっくり論じて解決する