Heroes one defrauds (5)
I believe the answer is:
icons
'heroes' is the definition.
(I've seen this in another clue)
'one defrauds' is the wordplay.
'one' becomes 'I' (Roman numeral).
'defrauds' becomes 'cons' ('con' can be a synonym of 'defraud').
'i'+'cons'='ICONS'
(Other definitions for icons that I've seen before include "Religious pictures" , "Graphic symbols on computer screens" , "revered art" , "Computer displays" , "Screen symbols on 4 across" .)