Vibrant diamante pants (8)
I believe the answer is:
animated
'vibrant' is the definition.
(I've seen this before)
'diamante pants' is the wordplay.
'pants' indicates an anagram (UK informal term for 'nonsense' or 'rubbish').
'diamante' with letters rearranged gives 'ANIMATED'.
(Other definitions for animated that I've seen before include "Lively - brought to life by Disney?" , "put in spirit" , "Vivacious in diamante" , "Mandate I confer on the lively" , "full of beans" .)