Dine out on small change - it's filthy (8)
I believe the answer is:
indecent
'filthy' is the definition.
(thesaurus)
'dine out on small change' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'on' says to put letters next to each other.
'small change' becomes 'cent' (I've seen this in another clue).
'dine' anagrammed gives 'inde'.
'inde'+'cent'='INDECENT'
'it's' acts as a link.
(Other definitions for indecent that I've seen before include "Gross, unbecoming" , "Indecorous" , "Immodest or obscene" , "blue" , "Risque" .)