I press on with a false or slanderous allegation (9)
I believe the answer is:
aspersion
'slanderous allegation' is the definition.
'aspersion' can be an answer for 'allegation' (thesaurus). I'm unsure of the 'slanderous' bit.
'i press on with a false' is the wordplay.
'with' is a charade indicator (letters next to each other).
'false' is an anagram indicator.
'i'+'press'+'on'+'a'='ipressona'
'ipressona' is an anagram of 'ASPERSION'.
'or' is the link.
Can you help me to learn more?
(Other definitions for aspersion that I've seen before include "Attack on reputation" , "Attack on the character" , "No praises given to the act of defaming 99)" , "Cast this slur" , "Defamatory suggestion" .)