Well done, you are quite right. I put in "we hear" because it referred to "i" which only
sounds like "eye" instead of meaning the same thing or the word "eye" being an actual part of the answer. In a lot of crosswords I've done, "we hear" in the clue indicated that the element "sounded like that" but was spelled differently.
I first heard of Galen in "Medicine Through Time" - one of the units on a new "O" Level History course back in the 80's.
I had thought of just putting "place of turmoil" because I thought "breaking" was a bit of a giveaway.

But I think a lot of the fun is in fitting every bit of the clue to the answer.