Desecrate (7)
I believe the answer is:
profane
'desecrate' is the definition.
(I know that desecrate can be written as profane)
This is all the clue.
(Other definitions for profane that I've seen before include "Secular; obscene" , "Impious" , "Unholy" , "Blasphemous, irreligious" , "Treat with irreverence" .)