Blast Noel and Pam's unnecessary words (8)
I believe the answer is:
pleonasm
'unnecessary words' is the definition.
(pleonasm is using too many words to say something)
'blast noel and pam's' is the wordplay.
'blast' is an anagram indicator (I've seen 'blasted' mean this).
'and' says to put letters next to each other.
'noel'+'pams'='noelpams'
'noelpams' is an anagram of 'PLEONASM'.
(Other definitions for pleonasm that I've seen before include "Excessive use of words" , "The use of more words than needed to convey meaning" , "a word too many!" , "superfluous word" .)