Organists wanting doughnut breaking the scales? (4,4)
I believe the answer is:
star sign
'the scales?' is the definition.
(Libra the scales is a star sign)
'organists wanting doughnut breaking' is the wordplay.
'wanting' suggests deleting specific letters (wanting can mean lacking).
'doughnut' becomes 'o' (letter resembling a doughnut).
'breaking' is an anagram indicator.
'organists' with 'o' taken out is 'rganists'.
'rganists' anagrammed gives 'STAR SIGN'.
(Other definitions for star sign that I've seen before include "Eg, Taurus" , "Archer for one" , "Leo, for example" , "Virgin, for example" , "Leo perhaps" .)