Waterway in Phoenix? (5)
I believe the answer is:
river
I believe this clue is a double definition.
'waterway' is the first definition.
(I've seen this before)
'phoenix?' is the second definition.
(actor River Phoenix)
'in' acts as a link.
(Other definitions for river that I've seen before include "Large flow of liquid" , "Eg, Thames or Nile" , "Such as the Nile or Amazon" , "Eg, Trent" , "Large natural stream of water" .)