A clear note to twin girls (5)
I believe the answer is:
vivid
'a clear' is the definition.
(thesaurus)
'note to twin girls' is the wordplay.
'note' becomes 'd' (musical note).
'to' is a charade indicator (letters next to each other) (I've seen this in other clues).
'twin girls' becomes 'vivi' (I am not sure about this - if you are sure you should believe this answer much more).
'd' after 'vivi' is 'VIVID'.
Can you help me to learn more?
(Other definitions for vivid that I've seen before include "Strong and bright, colour perhaps" , "Fresh and bright" , "Presenting a clear and striking picture" , "Graphic" , "Brilliant" .)