Brilliant border of alluring bedding (8)
I believe the answer is:
aglitter
'brilliant' is the definition.
'border of alluring bedding' is the wordplay.
'border of' means to remove the middle letters (I've seen 'borders of' mean this).
'bedding' becomes 'litter' (synonyms).
'alluring' with its middle taken out is 'ag'.
'ag'+'litter'='AGLITTER'
(Other definitions for aglitter that I've seen before include "Shiny" , "Sparkling with light" .)