Resolute female avoiding quarrel (3-3)
I believe the answer is:
all-out
But I can't explain it at all! Could you help me understand?
(Other definitions for all-out that I've seen before include "Exerting maximum effort - nobody home" , "Using full strength or energy - nobody home?" , "At full speed - no one at home" , "Using maximum effort" , "Whole-hearted (effort)" .)