Holy ground covered in East European affair (7)
I believe the answer is:
episode
'european affair' is the definition.
'episode' can be an answer for 'affair' (thesaurus). I am not certain of the 'european' bit.
'holy ground covered in east' is the wordplay.
'holy' becomes 'epi' (I can't explain this - if you can you should believe this answer much more).
'ground' becomes 'sod' (both can mean a piece of earth).
'covered in' is a charade indicator (letters next to each other) (some letters go on top of or cover others).
'east' becomes 'E' (synonyms).
'epi'+'sod'+'e'='EPISODE'
Can you help me to learn more?
(Other definitions for episode that I've seen before include "Distinctive incident" , "Bout" , "Part of TV series" , "Distinctive happening" , "Incident or event as part of sequence" .)