Literal:
* The clown's red nose made the children laugh.
* After spending the day in the cold, my red nose was practically glowing.
* The snowman had a carrot for a nose, but it was starting to melt, leaving behind a red nose.
Figurative:
* He told a joke, hoping for a laugh, but his red nose suggested he was the one who was being fooled.
* The detective's red nose was a giveaway that he hadn't slept much in the past few days.
* The news report was full of alarming statistics, enough to give anyone a red nose.
Idioms:
* He walked in with a red nose and a sheepish grin, admitting he'd been caught drinking. (Meaning: He was embarrassed)
* The politician's red nose made it clear he was lying. (Meaning: He was blushing with shame)
You can adjust these examples to fit your own context and style.