No musical info given up (8)
I believe the answer is:
negative
'no' is the definition.
(I've seen this before)
'musical info given up' is the wordplay.
'musical' becomes 'evita' (Andrew Lloyd Webber musical).
'info' becomes 'gen' (informal term for information).
'given up' says the letters should be written backwards (in a down clue, letters go up).
'evita'+'gen'='evitagen'
'evitagen' backwards is 'NEGATIVE'.
(Other definitions for negative that I've seen before include "'Pessimistic, gloomy (8)'" , "Film showing black and white tones reversed" , "Snap out of it? Yes" , "Pessimistic, discouraging" , "Piece of photographic film" .)