Mythical bird? It's found in Arizona (7)
I believe the answer is:
phoenix
I believe this is a double definition.
'mythical bird?' is the first definition.
(I've seen this before)
'it's found in arizona' is the second definition.
(Phoenix is the capital of Arizona)
(Other definitions for phoenix that I've seen before include "25 28 [MARS LANDER]" , "Arizona city (that rose from the ashes?)" , "Legendary bird born from ashes" , "part of Arizona" , "Reborn bird" .)