Worry that rap genre is squandering covers (5)
I believe the answer is:
angst
'worry' is the definition.
(angst means worry or dread)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for angst that I've seen before include "Feeling of guilt or remorse" , "Acute anxiety about oneself" , "Apprehension" , "Anxious state" , "Nonspecific sense of anxiety" .)