Even having money, this would be a great deal! (8,5)
I believe the answer is:
straight flush
'deal' is the definition.
(I know that straight flush is a type of poker hand)
'even having money' is the wordplay.
'even' becomes 'straight' (similar in meaning).
'having money' becomes 'flush' (I can't justify this - if you can you should give a lot more credence to this answer).
'straight'+'flush'='STRAIGHT FLUSH'
'this would be a great' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for straight flush that I've seen before include "Powerful hand at poker" , "Gambler's hand that should win" , "Good group of clubs" , "Good poker hand" , "(In poker) five cards of the same suit in numerical sequence" .)