Sexy Mike's not into improvised soul music (8)
I believe the answer is:
luscious
'sexy' is the definition.
(similar in meaning)
I don't understand the rest of the clue.
(Other definitions for luscious that I've seen before include "Richly sweet" , "nicely rich" , "Highly attractive, tasty" , "Juicy" , "'Delicious, scrumptious (8)'" .)