Note batch of young showing brilliance (7)
I believe the answer is:
glitter
'brilliance' is the definition.
(thesaurus)
'note batch of young' is the wordplay.
I cannot really understand how this works, but
'note' could be 'te' (musical note) and 'te' is present in the answer.
This explanation may well be incorrect...
'showing' is the link.
Can you help me to learn more?
(Other definitions for glitter that I've seen before include "Flash" , "Sparkly decoration" , "addition to Christmas card" , "Sparkle on cards" , "Shine brightly, coldly" .)