Yes, cuing is a Scrabble word!
...and is worth 8 points in Scrabble, and 12 points in Words with Friends
cuing
Verb
1. Assist (somebody acting or reciting) by suggesting the next words of something forgotten or imperfectly learned
What Scrabble words can I make with the letters in cuing?
4 Letter Words
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3 Letter Words
2 Letter Words