Dry gully (4)
'dry gully' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for arroyo that I've seen before include "Dry gully; yo roar (anag.)" , "Dry watercourse" , "dry course" , "Often dry desert ravine" , "Rocky ravine" .)
'dry gully' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for wadi that I've seen before include "River valley; dry bed" , "Mostly dry river valley" , "(Usually) dry desert riverbed" , "Seasonally dry watercourse" , "Rocky watercourse in N Africa" .)