For the beginners she is good with 350% damage and 45 AP (if you max it out). Parting shot may be effective against the walkers.
She is not bad but she aint a sam and is definitely not a kenny
Clementine in the 4 star meta was disgusting. She hits really hard against blues and always seemed to be rather tanky for a 4 star imo. I wanted her so bad way back in the day, but by the time I got her, I already had enough yellows for my yellow 5* Morgan team
I think she is good enough to win it.