After party, the Spanish soprano is slurring (6)
I believe the answer is:
libels
'is slurring' is the definition.
I can't judge whether this defines the answer.
'after party the spanish soprano' is the wordplay.
'after' is a charade indicator (letters next to each other).
'party' becomes 'lib' (abbreviation for Liberal, uk political party).
'the spanish' becomes 'el' ('the' in Spanish).
'soprano' becomes 's' (musical abbreviation).
'lib' put next to 'el' is 'libel'.
'libel'+'s'='LIBELS'
Can you help me to learn more?
(Other definitions for libels that I've seen before include "Slanders in writing" , "Publishes false and damaging statement about a person" .)