I doubt it

CHEAT
List of words for the clue I doubt it from the crossword:
SURE SKA PROVE TOBESURE ORISIT KNEW IMSURE EMOTION ASIF QUESTION ENSURE ASSURES ASSURE YES SURELY STREEP SCOFF INDUBITABLY HAH EHS
WordClue
FRAUDcheat, imposture
TRICKfraud, cheat
MOTIONquestion, doubt
EMOTIONpanic or doubt
PROBABLESomething that it likely to occur
QUESTIONdoubt
IODINEI
HOLMIan, actor