They disparage attention seekers (8)
I believe the answer is:
knockers
I believe this clue is a double definition.
'they disparage' is the first definition.
(people who knock or disparage things)
'attention seekers' is the second definition.
(doorknockers get people's attention)
(Other definitions for knockers that I've seen before include "Critics" , "those delivering rap" , "those rapping" , "They criticise" .)