It provides drink from a pot he's brewed up (7)
I believe the answer is:
teashop
'he's brewed up' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'it provides drink from a pot' is the wordplay.
'it' becomes 'e' ('e' can mean 'electronic' which is similar to 'IT').
'provides' becomes 'ash' (I can't explain this - if you can you should believe this answer much more).
'drink' indicates putting letters inside.
'from' indicates an anagram (the anagram comes from the same letters).
'e'+'ash'='eash'
'pot' anagrammed gives 'top'.
'eash' placed inside 'top' is 'TEASHOP'.
Can you help me to learn more?
(Other definitions for teashop that I've seen before include "Cafe (paradoxically?)" , "Place of refreshments" .)