You could have a situation where a human fighting Ellie gets taken out by a Clicker from behind and the dead human falls on top of Ellie. Now the Clicker is on top of the dead human reaching down to Ellie and Ellie has to kill the Clicker through the dead body. It ends with an exhausted Ellie grunting and glaring with the two corpses on her.
Ellie can also obviously lead a pack of Clickers to a human base and wreck havoc. She would have to be careful though.