Truth stands between man or criminal (10)
I believe the answer is:
malefactor
'criminal' is the definition.
(I know that criminal can be written as malefactor)
'truth stands between man or' is the wordplay.
'truth stands' becomes 'fact' (I am not sure about this - if you are sure you should believe this answer much more).
'between' indicates putting letters inside.
'man' becomes 'male'.
'male'+'or'='maleor'
'fact' put into 'maleor' is 'MALEFACTOR'.
Can you help me to learn more?
(Other definitions for malefactor that I've seen before include "bad person?" , "Wrongdoer" , "Criminal, evil-doer" , "Sinner" , "One doing wrong" .)