A very rich man delves into his pocket perhaps (5)

I believe the answer is:

dives

I'm a little stuck... Click here to teach me more about this clue!

'a very rich man' is the definition.
'dives' can be an answer for 'man' (I have seen 'rich man' mean 'dives' so perhaps 'man' could also mean 'dives'). I am unsure of the 'a very rich' bit.

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for dives that I've seen before include "Disreputable resorts" , "Gets into water" , "Plunges head first" , "rich man used" , "Disreputable bars" .)

I've seen this clue in The Globe and Mail.

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