Rubbish concealed by statistics (3)
I believe the answer is:
tat
'rubbish' is the definition.
(I've seen this before)
'concealed by statistics' is the wordplay.
'concealed' says the answer is hidden in the clue.
'TAT' is hidden in the letters of 'by statistics'.
(Other definitions for tat that I've seen before include "Shoddy stuff (colloq.)" , "Shoddy items" , "Tawdry and shabby article" , "trashy clothing" , "Tawdry or shabby articles" .)