Tree on the Connecticut quarter (3)
I believe the answer is:
oak
'tree on the connecticut quarter' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for oak that I've seen before include "Acorn-bearing tree" , "Large tree" , "The King of the Forest" , "Tree of the genus Quercus" , "door at Oxford" .)