Mooted car to be decorated - for this? (9)
I believe the answer is:
motorcade
'this?' is the definition.
The definition suggests a singular noun which matches the answer.
'mooted car to be decorated' is the wordplay.
'to be decorated' indicates anagramming the letters (letters decorated or arranged differently).
'mooted'+'car'='mootedcar'
'mootedcar' is an anagram of 'MOTORCADE'.
'for' acts as a link.
(Other definitions for motorcade that I've seen before include "Car to demo (anag)" , "Line of cars escorting a dignitary" , "vehicular procession" , "Vehicle procession" , "Moving display" .)