Criminal drooled over a fabulously rich city (2,6)
I believe the answer is:
el dorado
'fabulously rich city' is the definition.
'el dorado' can be an answer for 'city' (I've seen this before). I am not sure about the 'fabulously rich' bit.
'criminal drooled over a' is the wordplay.
'criminal' indicates anagramming the letters.
'over' indicates putting letters inside.
'drooled' with letters rearranged gives 'eldordo'.
'eldordo' enclosing 'a' is 'EL DORADO'.
Can you help me to learn more?
(Other definitions for el dorado that I've seen before include "'Imaginary place of great wealth and opportunity (2,6)'" , "Place promising great wealth" , "Golden land imagined by the Spanish explorers of America" , "Fabled wealthy place" , "Imaginary land of riches" .)