Like the flibbertigibbet Miss Bird? (7)
I believe the answer is:
flighty
'like' is the definition.
Both the definition and answer are adjectives. Maybe there's an association between them I don't understand?
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for flighty that I've seen before include "Frivolous - irresponsible" , "as a bird?" , "Fickle; erratic" , "Changeable" , "rather impetuous?" .)