City east of Phoenix (4)
I believe the answer is:
mesa
'city east of phoenix' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for mesa that I've seen before include "In the USA, a steep-sided flat-topped hill" , "Flat tableland with steep sides" , "Isolated flat-topped hill" , "US steep-sided tableland" , "Flat-topped tableland" .)