Mardi Gras, for example (8)
I believe the answer is:
carnival
'mardi gras for example' is the definition.
(I know that Fat Tuesday is a type of carnival)
This is the entire clue.
(Other definitions for carnival that I've seen before include "Travelling funfair" , "Festive fair" , "Festive period" , "riotous merrymaking" , "Festive entertainment" .)