Crossword Genius

This may please a card player a lot (1,5,4)

Ross

I believe the answer is:

a great deal

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

This could be a double definition.

'this may please a card player' is the first definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.

'a lot' is the second definition.
(synonyms)

Can you help me to learn more?

(Other definitions for a great deal that I've seen before include "Some bargain" , "What the card player wants" , "lots" , "many" , "Poker player will be hoping for this" .)

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