Criminal drooled about a fabulously rich city (8)
I believe the answer is:
eldorado
'fabulously rich city' is the definition.
'eldorado' can be an answer for 'city' (I have seen 'city of riches' mean 'eldorado' so perhaps 'city' could also mean 'eldorado'). I am unsure of the 'fabulously rich' bit.
'criminal drooled about a' is the wordplay.
'criminal' indicates an anagram.
'about' means one lot of letters goes inside another.
'drooled' is an anagram of 'eldordo'.
'eldordo' enclosing 'a' is 'ELDORADO'.
Can you help me to learn more?
(Other definitions for eldorado that I've seen before include "rich land, so many thought" , "The golden land?" , "wealthy location" , "city, apparently lost" , "city of riches" .)