Singer has some listeners in a trance (7)
I believe the answer is:
sinatra
'singer' is the definition.
(Frank Sinatra)
'some listeners in a trance' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'SINATRA' is hidden in the letters of 'listeners in a trance'.
'has' is the link.
(Other definitions for sinatra that I've seen before include "Entertainer" , "Francis Albert ..., singer and actor" , "Francis Albert, late lamented crooner" , "Was his singing a strain?" , "Francis Albert did it his way" .)