Ran libel article about dancer (9)
I believe the answer is:
ballerina
'dancer' is the definition.
(ballerina is a kind of dancer)
'ran libel article about' is the wordplay.
'article' becomes 'a' (English indefinite article).
'about' indicates anagramming the letters.
'ran'+'libel'+'a'='ranlibela'
'ranlibela' is an anagram of 'BALLERINA'.
(Other definitions for ballerina that I've seen before include "girl on point duty" , "agile performer" , "Pavlova?" , "girl from the Kirov?" , "Danseuse" .)