Ruin peace, being terrible person living for good food and drink? (9)
I believe the answer is:
epicurean
'person living for good food and drink?' is the definition.
'ruin peace being terrible' is the wordplay.
'being terrible' indicates anagramming the letters.
'ruin'+'peace'='ruinpeace'
'ruinpeace' is an anagram of 'EPICUREAN'.
(Other definitions for epicurean that I've seen before include "Bon vivant" , "Hedonist" , "Gourmet" , "enjoyer of fine food" , "Living for pleasure" .)