Blue ___ (symbol of Delaware) (3)
I believe the answer is:
hen
'blue symbol of delaware' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hen that I've seen before include "Composed of women" , "Clucking female" , "Female lobster, fowl" , "Laying bird" , "Insufficient in amount" .)