Joke (3-4)
'joke' is the definition.
(a gag is a joke or witticism)
This is all the clue.
(Other definitions for gag that I've seen before include "Put a muzzle on the joke" , "Muffle with slang joke" , "Retch at the joke?" , "Kind of muzzle or informal joke" , "Stifle; joke" .)
'joke' is the definition.
(pun is a type of joke)
This is the entire clue.
(Other definitions for pun that I've seen before include "conceit by a wordsmith?" , "Bit of paronomasia; witticism" , "Double entendre" , "Form of wordplay" , "joke" .)
'joke' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for jape that I've seen before include "Trick - joke - jest" , "Jolly wheeze" , "Practical joke, jest" , "Trick or prank" , "Jolly joke" .)
'joke' is the definition.
(a quip is a joke or witticism)
This is the entire clue.
(Other definitions for quip that I've seen before include "Off-the-cuff joke" , "Witticism" , "Witty or sarcastic remark" , "Gibe" , "Bon mot" .)
'joke' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for jest that I've seen before include "Quip" , "Piece of humour" , "attempt at humour" , "Joke, fool about" , "Joke, gag" .)
'joke' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for wisecrack that I've seen before include "cause of mirth?" , "Pithy remark" , "Dig" , "Ironically witty remark" , "Having joined one liner" .)
'joke' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for leg-pull that I've seen before include "Informal hoax involving lower limb" , "Trick; practical joke" , "Good-humoured hoax" , "Trying to make somebody believe what is not true as a joke" , "Hoax exerted on lower limb?" .)