Pageant rubbish as well (6)
I believe the answer is:
tattoo
'pageant' is the definition.
(I have seen 'Military pageant' mean 'tattoo' so perhaps 'pageant' could also mean 'tattoo')
'rubbish as well' is the wordplay.
'rubbish' becomes 'tat' (tat can mean rubbish or poor-quality material).
'as well' becomes 'too' (both can mean 'also').
'tat'+'too'='TATTOO'
(Other definitions for tattoo that I've seen before include "Pointedly design" , "that leaves a permanent impression on one" , "Picture dyed into the skin" , "Military call and design on the skin" , "hide design?" .)