Superior joint brings in awfully huge revenue initially (6-2)
I believe the answer is:
higher-up
'superior' is the definition.
(thesaurus)
'joint brings in awfully huge revenue initially' is the wordplay.
'joint' becomes 'hip' (hip joint is a kind of joint).
'brings in' means one lot of letters goes inside another.
'awfully' indicates an anagram.
'initially' indicates taking the first letters.
The first letter of 'revenue' is 'r'.
'huge'+'r'='huger'
'huger' anagrammed gives 'gheru'.
'hip' placed around 'gheru' is 'HIGHER-UP'.
(Another definition for higher-up that I've seen is " Senior person".)