Music genre that’s endlessly entranced (3)
I believe the answer is:
rap
'music genre' is the definition.
(I know that rap is a type of popular music)
'endlessly entranced' is the wordplay.
'endlessly' means to remove the last letter.
'entranced' becomes 'rapt' (I've seen this in another clue).
'rapt' with its last letter taken away is 'RAP'.
'that's' is the link.
(Other definitions for rap that I've seen before include "Knock sharply" , "Censure" , "Sharp knock; rebuke" , "Knock - punishment - monologue to music" , "talking during musical performance" .)