Continental banker, extremely rich individual (5)
I believe the answer is:
rhone
'continental banker' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'extremely rich individual' is the wordplay.
'extremely' means to remove the middle letters.
'individual' becomes 'one' (an individual is one person).
'rich' with its centre taken out is 'rh'.
'rh'+'one'='RHONE'
Can you help me to learn more?
(Other definitions for rhone that I've seen before include "Swiss-French river" , "12 wine region" , "River rising in Switzerland and flowing into the Mediterranean" , "River at Lyons" , "wherein runs rain in Arbroath" .)