anti-smut
adjective
an·ti-smut 
ˌan-tē-ˈsmət,
ˌan-tī- variants or antismut
: characterized by or expressing opposition to pornography
a tireless antismut crusader …
B. J. Oliphant
B. J. Oliphant… the Times reported that 142 so-called adult businesses now operate in New York City—just two fewer than in 1998, when Giuliani first launched his anti-smut campaign. Eric Fettmann
Eric Fettmann
Word History
First Known Use
1939, in the meaning defined above