Fat Charlie gets rich importing rubies originally (9)
I believe the answer is:
corpulent
'fat' is the definition.
('corpulent' can be similar in meaning to 'fat')
'charlie gets rich importing rubies originally' is the wordplay.
'charlie' becomes 'c' (phonetic alphabet: alpha, bravo, charlie etc.).
'gets' is a charade indicator (letters next to each other).
'rich' becomes 'opulent' ('opulent' can be similar in meaning to 'rich'**).
'importing' means one lot of letters goes inside another.
'originally' indicates taking the first letters.
The first letter of 'rubies' is 'r'.
'opulent' enclosing 'r' is 'orpulent'.
'c'+'orpulent'='CORPULENT'
(Other definitions for corpulent that I've seen before include "Rotund, obese" , "Having a bulky body, fat" , "Portly" , "bloated" , "stout" .)