Rubbishy sopranos lacking a patron (7)
I believe the answer is:
sponsor
'patron' is the definition.
(I know that patron can be written as sponsor)
'rubbishy sopranos lacking a' is the wordplay.
'rubbishy' indicates anagramming the letters (I've seen this in other clues).
'lacking' is a deletion indicator.
'sopranos' with 'a' removed is 'soprnos'.
'soprnos' with letters rearranged gives 'SPONSOR'.
(Other definitions for sponsor that I've seen before include "Event funder; godparent" , "Promoter; funder" , "One giving money in support of an event" , "Provide funds for a project or person" , "Patron or backer" .)