Lots of one sought by bargain hunter (1,5,4)
I believe the answer is:
a great deal
This clue might be a double definition.
'lots' is the first definition.
(I've seen this before)
'one sought by bargain hunter' is the second definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for a great deal that I've seen before include "Very much" , "lots" , "Some bargain" , "many" , "What the card player wants" .)