Ive often seen this type of behaviour as a preclude to spawning. Dont worry shes not unwell in any way.
She is obsessed with the anemone.The anemone still eats and doesn't seem to be getting worse .The clown has moved all the sand away from the anemone.
Is she alone? Or have a mate? I remember when I bought a big maroon I also bought a very small one ,she gave this hapless lad a terrible beating before they bonded.
If you are used to Cichlid behaviour? Thier basicaly the same spawning wise.
Probably cleaning the area. Mine do something similar every now and then.
She is on her own I did try to add a very small maroon clown fish but she battered it.i removed it because she would of killed it.
Yeah they get incredibly rough. Mine had split fins and all sorts , it could have actualy gone either way . I was lucky and she found him worthy.
As Graeme has suggested that too could very well be what shes doing .