Desecration of New Age relics (9)
I believe the answer is:
sacrilege
'desecration' is the definition.
(synonyms)
'new age relics' is the wordplay.
'new' indicates an anagram.
'age'+'relics'='agerelics'
'agerelics' anagrammed gives 'SACRILEGE'.
'of' is the link.
(Other definitions for sacrilege that I've seen before include "Religious violation" , "Blasphemy" , "Misuse of something sacred" , "Violation of something holy" , "Gross irreverence" .)