Denounce Charlie dipping into exotic sauce (6)
I believe the answer is:
accuse
'denounce' is the definition.
(thesaurus)
'charlie dipping into exotic sauce' is the wordplay.
'charlie' becomes 'C' (phonetic alphabet).
'dipping into' is an insertion indicator.
'exotic' indicates anagramming the letters (an unusual form of the letters).
'sauce' is an anagram of 'acuse'.
'c' placed inside 'acuse' is 'ACCUSE'.
(Other definitions for accuse that I've seen before include "Charge (someone) with an offence" , "Impute fault to, indict" , "Charge with wrong-doing" , "Put on trial" , "Lay blame or allege guilt" .)