What Celia may be with Alice! (8)
I believe the answer is:
confused
If this is the answer, I'm afraid I cannot explain it.
Can you help me to learn more?
(Other definitions for confused that I've seen before include "Muddled" , "Mixed up in fun codes" , "Unable to think clearly, bewildered" , "Bewildered, perplexed" , "In a muddle, perplexed" .)