A deceit performed by one of those typically drunk in the summer (4,3)
I believe the answer is:
iced tea
'those typically drunk in the summer' is the definition.
I can't tell whether this defines the answer.
'a deceit performed by one' is the wordplay.
'performed' indicates anagramming the letters.
'by' means one lot of letters go next to another.
'one' becomes 'a' (a thing is one thing).
'deceit' with letters rearranged gives 'icedte'.
'icedte'+'a'='ICED TEA'
'of' is the link.
Can you help me to learn more?
(Other definitions for iced tea that I've seen before include "Cold summer drink" , "Chilled drink" , "Cool drink" .)