Lust she isn’t distributing - just a bit of slovenly debauchery? (12)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

Anagram (distributing) of LUST SHE ISN’T , then the first letter (just a bit) of S [lovenly]. A hint of an extended definition, because “slut” originally meant the same as “sloven” = an untidy or lazy woman, rather than a sexually promiscuous one.