"Really, now!"

AWCMON

["This exclamation of disbelief sounds like a playful mix of \"aw\" and \"come on.\""]

The clue "Really, now!" is a playful way to hint at the answer "AWCMON." It mimics the sound of someone saying "Aw, come on!" in a casual, exasperated tone. The spelling "AWCMON" is a phonetic representation of that phrase, often used in crosswords to capture informal speech. This type of clue relies on recognizing the spoken sound rather than a direct definition.