Brewer falsifying report about drink (10)
I believe the answer is:
percolator
'brewer' is the definition.
(something which 'brews')
'falsifying report about drink' is the wordplay.
'falsifying' indicates anagramming the letters.
'about' indicates putting letters inside.
'drink' becomes 'cola' (I've seen this before**).
'report' is an anagram of 'pertor'.
'pertor' going around 'cola' is 'PERCOLATOR'.
(Other definitions for percolator that I've seen before include "Coffee machine" , "filter machine" .)