“Crunch” is a word used to describe something that happens with a very short deadline, at the last minute, or when there is no other choice. It’s a noun (although it is being used as an adjective in your example), and is often used as part of the phrase, “in a crunch” (e.g., “John isn’t as good a football player as Frank, but we can use him in a crunch”). THIS IS MY 1,000TH ANSWER TO QUESTIONS ON ITALKI!

I'm guessing it should be "crunch time" talks. Crunch time is slang for things that happen with urgency at the last moment. I've never heard the phrase "crunch talks".