Practical joke (5)
'practical joke' is the definition.
(I know that practical joke can be written as prank)
This is the entire clue.
(Other definitions for prank that I've seen before include "April fool" , "(Amusing) trick" , "Mischievous act done for fun and amusement" , "Jape" , "Mischievous trick" .)
'practical joke' is the definition.
(practical joke can mean a hoax or trick)
This is all the clue.
(Other definitions for hoax that I've seen before include "Playful fraud" , "Humorous or malicious deception" , "Act of deception" , "A fraud or deception" , "Kid" .)