Pestered, wanting emblem of bright colour (8)
I believe the answer is:
badgered
'pestered' is the definition.
('badger' can be a synonym of 'pester')
'wanting emblem of bright colour' is the wordplay.
'wanting' is a charade indicator (letters next to each other).
'emblem' becomes 'badge' (badge is a kind of emblem).
'of bright colour' becomes 'red'.
'badge' next to 'red' is 'BADGERED'.
(Other definitions for badgered that I've seen before include "hassled" , "Pestered" , "chivvied" , "Harassed" , "Annoyed persistently" .)