Member getting a large offer that's valid (5,6)
I believe the answer is:
legal tender
'member' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'getting a large offer that's valid' is the wordplay.
'getting' says to put letters next to each other.
'a large offer' becomes 'tender' (tender can mean to offer something. I am not sure about the 'large' bit.).
'that's valid' becomes 'legal' (similar in meaning).
'tender' put after 'legal' is 'LEGAL TENDER'.
Can you help me to learn more?
(Other definitions for legal tender that I've seen before include "Money which must be accepted as payment" , "coins?" , "Official currency" , "... [HALF CROWNS] no longer this" , "Valid currency" .)