Fabled city of gold (2,6)
'fabled city of gold' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for el dorado that I've seen before include "Mythical land of gold" , "Place of fabulous opportunity" , "A doodler in fabled land of gold" , "Mythical city of gold" , "Golden land imagined by the Spanish explorers of America" .)
(Other definitions for eldorado that I've seen before include "source of wealth" , "The golden land?" , "wealthy location" , "city of riches" , "rich land, so many thought" .)