Grace lies about desecration (9)
I believe the answer is:
sacrilege
'desecration' is the definition.
(I know that desecration can be written as sacrilege)
'grace lies about' is the wordplay.
'about' indicates an anagram.
'grace'+'lies'='gracelies'
'gracelies' anagrammed gives 'SACRILEGE'.
(Other definitions for sacrilege that I've seen before include "Extreme disrespect for something holy" , "Blasphemous behaviour" , "Violation of a holy thing" , "Sinful behaviour" , "Impious act" .)