By importing lager, finally we're stirring drinks provider (7)
I believe the answer is:
brewery
'drinks provider' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'by importing lager finally we're stirring' is the wordplay.
'importing' means one lot of letters goes inside another.
'finally' says to take the final letters.
'stirring' is an anagram indicator.
The last letter of 'lager' is 'r'.
'r'+'were'='rwere'
'rwere' is an anagram of 'rewer'.
'by' going around 'rewer' is 'BREWERY'.
Can you help me to learn more?
(Other definitions for brewery that I've seen before include "something to drink here" , "Where beer is made" , "Place making beer" , "Porter works, possibly" , "Drink producer" .)