Scrooge's Boxing Day uplifting? That's not the right word (8)
I believe the answer is:
misnomer
'not the right word' is the definition.
'scrooge's boxing day uplifting?' is the wordplay.
'scrooge' becomes 'miser' (synonyms).
'boxing' means one lot of letters goes inside another ('box' can mean contain, as in to put in a box).
'day' becomes 'mon' (abbreviation for Monday).
'uplifting?' says the letters should be written in reverse (I've seen 'uplift' mean this).
'mon' backwards is 'nom'.
'miser' enclosing 'nom' is 'MISNOMER'.
'that's' acts as a link.
(Other definitions for misnomer that I've seen before include "Incorrect or unsuitable name" , "bad term" , "Is Norm me? (anag)" , "One wrongly named" , "Simmer on (anag)" .)