Allusion - A reference intended to call something to mind without directly mentioning it

(Pronounced uh-loo-zhn)

A strange illusion (allusion). I suppose it was a reference to a rabbit in a hat but that wasn't mentioned directly when the magician pulled a mouse from a shoe.

Examples

She made no allusion to the incident.  

Harry was unsure if his friend was making some allusion to him.

She made and allusion about her ex-boyfriend in her song.