A little drink to finish a meal, and that's the lot (5)
I believe the answer is:
total
'the lot' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'a little drink to finish a meal' is the wordplay.
'a little drink' becomes 'tot' (tot can mean a small drink of alcohol).
'to finish' means to take half the letters.
'meal' cut in half is 'al'.
'tot'+'al'='TOTAL'
'and that's' acts as a link.
Can you help me to learn more?
(Other definitions for total that I've seen before include "Come to" , "Complete, absolute" , "Entirety" , "It might be grand" , "Unqualified" .)