Music in D sharp; nothing unusual at the end of the day (8)
I believe the answer is:
rhapsody
'music' is the definition.
(I know that rhapsody is a type of music)
'd sharp nothing unusual at the end of the day' is the wordplay.
'nothing' becomes 'O' (looks like zero - 0).
'unusual' indicates an anagram.
'at the end of' says to take the final letters.
The last letter of 'day' is 'y'.
'd'+'sharp'+'o'='dsharpo'
'dsharpo' is an anagram of 'rhapsod'.
'rhapsod'+'y'='RHAPSODY'
'in' is the link.
(Other definitions for rhapsody that I've seen before include "epic poetry" , "Expression of ecstatic enthusiasm" , "ecstatic words?" , "Piece of writing" , "Ecstasy" .)