The scene describes Alice observing a fight between two hedgehogs. She sees it as a good chance to use her croquet mallet, which is a flamingo, to hit one hedgehog with the other. However, she faces a problem because her flamingo has moved away, making it challenging to carry out her plan.
"The hedgehog was engaged in a fight with another hedgehog, which seemed to Alice an excellent opportunity for croqueting one of them with the other." Alice's intent was to turn this chaotic situation into a playful game, but the absence of her flamingo caused a setback in her amusing and curious adventure in Wonderland.