Water alone won't help clear up an impacted crop, and it sounds like that's what your chick has. You need to give her at least one teaspoon of oil. Coconut oil is the easiest and safest to use because you can use it in its solid form and slip pieces into the chick's beak, placing them on the tongue, and she will swallow.
After you get all the oil into the chick, massage the crop gently until you feel the contents break up and go down. You need to check her crop again first thing in the morning before you give her food to be sure the crop is empty. If it's got anything in it, repeat the oil and massage.
I feed chopped boiled egg as the first food after a crop disorder to get the chick eating again. And a probiotic or some yogurt will help restore good microbes in her digestive system.
Chicks need access to appropriate grit to avoid crop disorders and constipation which can kill.
