Wealthy fellow to catch old boy (5)
I believe the answer is:
nabob
'wealthy fellow' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'catch old boy' is the wordplay.
'catch' becomes 'nab' (I've seen this in another clue).
'old boy' becomes 'OB' (abbreviation for a private school 'old boy').
'nab'+'ob'='NABOB'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for nabob that I've seen before include "Mogul governor; rich man" , "Powerful man" , "Person of great wealth" , "Person of conspicuous wealth or high status" , "VIP" .)