Notes anger welling up inside — it’s strange (5)
I believe the answer is:
eerie
'strange' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for eerie that I've seen before include "Weird and disturbing" , "spine-chilling" , "Mysterious" , "Oddly frightening" , "Awesome" .)