High notes played by daughter (6)
I believe the answer is:
stoned
'high' is the definition.
(on drugs)
'notes played by daughter' is the wordplay.
'played' indicates anagramming the letters (letters playing around).
'by' is a charade indicator (letters next to each other).
'daughter' becomes 'd' (genealogical abbreviation).
'notes' is an anagram of 'stone'.
'stone'+'d'='STONED'
(Other definitions for stoned that I've seen before include "Slangily drunk or attacked with rocks" , "Under the influence of narcotics, colloquially" , "Under the influence of drugs (colloq.)" , "steeped in alcohol?" , "Slangily drunk or drugged" .)