Victor brewed beer so gassy (7)
I believe the answer is:
verbose
'gassy' is the definition.
(thesaurus)
'victor brewed beer so' is the wordplay.
'victor' becomes 'v' (phonetic alphabet: alpha, bravo, charlie etc.).
'brewed' indicates an anagram.
'beer'+'so'='beerso'
'beerso' with letters rearranged gives 'erbose'.
'v'+'erbose'='VERBOSE'
(Other definitions for verbose that I've seen before include "Loquacious" , "With an excess of words" , "Observe (anag) -- long-winded" , "Using or containing too many words" , "Wordy, prolix" .)