Rocking tunes -- love absurd musical (6,9)
I believe the answer is:
sunset boulevard
'musical' is the definition.
'rocking tunes love absurd' is the wordplay.
'rocking' indicates an anagram.
'tunes'+'love'+'absurd'='tunesloveabsurd'
'tunesloveabsurd' is an anagram of 'SUNSET BOULEVARD'.
(Other definitions for sunset boulevard that I've seen before include "Musical from film about Hollywood" , "movie?" .)