What's owed reportedly brought up by eastern European (5)
I believe the answer is:
swede
'european' is the definition.
(Swede is an example)
'what's owed reportedly brought up by eastern' is the wordplay.
'what's owed' becomes 'due' (synonyms).
'reportedly' indicates a 'sounds like' (homophone) clue.
'brought' becomes 's' (I can't explain this - if you can you should believe this answer much more).
'up by' says the letters should be written backwards.
'eastern' becomes 'e'.
'due' sounds like 'dew'.
'dew'+'s'='dews'
'dews' back-to-front is 'swed'.
'swed'+'e'='SWEDE'
(Other definitions for swede that I've seen before include "Weeds out to get turnip" , "Someone from Gothenburg" , "Citizen of kingdom" , "Scandinavian; root veg." , "plant" .)