Sweet Polish-American bagging business qualification (3,4)
I believe the answer is:
rum baba
'sweet' is the definition.
(I've seen this before)
'polish-american bagging business qualification' is the wordplay.
'polish' becomes 'rub' (polish meaning rub to make shiny).
'american' becomes 'a' (common abbreviation - e.g. in organisation names).
'bagging' is an insertion indicator (bag can mean to take or obtain).
'business qualification' becomes 'mba' (I can't explain this - if you can you should believe this answer much more).
'rub'+'a'='ruba'
'ruba' placed around 'mba' is 'RUM BABA'.
Can you help me to learn more?
(Other definitions for rum baba that I've seen before include "Soaked sponge dessert" , "Yeasty cake soaked in spirit" , "Cake soaked in syrup" , "Spirit-soaked cake" , "Alcoholic cake" .)