European playwright succeeded with horror story (8)
I believe the answer is:
schiller
'european playwright' is the definition.
'schiller' can be an answer for 'playwright' (Friedrich Schiller). I am unsure of the 'european' bit.
'succeeded with horror story' is the wordplay.
'succeeded' becomes 's' (genealogical abbreviation).
'with' is a charade indicator (letters next to each other).
'horror story' becomes 'chiller'.
's'+'chiller'='SCHILLER'
Can you help me to learn more?
(Other definitions for schiller that I've seen before include "German poet and playwright" , "German dramatist (Maria Stuart, Wallenstein etc.)" , "German author" , "German writer" , "German dramatist/poet" .)