Dirty bones spread around church (7)
I believe the answer is:
obscene
'dirty' is the definition.
(similar in meaning)
'bones spread around church' is the wordplay.
'spread' indicates anagramming the letters.
'around' indicates putting letters inside.
'church' becomes 'CE' (abbreviation for Church of England).
'bones' is an anagram of 'obsne'.
'obsne' placed around 'ce' is 'OBSCENE'.
(Other definitions for obscene that I've seen before include "offending sensibilities?" , "Improper" , "Prurient" , "repellent" , "Dirty" .)