Sumptuously entertains a chap with drinks (7)

I believe the answer is:

regales

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'sumptuously entertains' is the definition.
'regales' can be an answer for 'entertains' (as in to entertain or regale someone with a story). I am unsure of the 'sumptuously' bit.

'a chap with drinks' is the wordplay.
'a chap' becomes 'reg' ().
'with' is a charade indicator (letters next to each other).
'drinks' becomes 'ales' (ale is a kind of drink).
'reg'+'ales'='REGALES'

Can you help me to learn more?

(Another definition for regales that I've seen is " Treats".)

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

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