flush out

verb

1. Used other than figuratively or idiomatically: see flush, out.
2. To drive out or expose something or someone, as a game bird or other game animal from cover.

   “The dogs flushed out some doves.”

   “The army flushed out the enemy spy.”

3. To flesh out.

   “It should serve to flush out the existing ideas, generate new ones, insure that the approach chosen is responsive to the goals, and perhaps most importantly, get the whole team to sign up and take ownership of the application approach.”

   “Brainstorming with friends and colleagues can help you flush out the details of the idea.”