Rhythmic song, releasing primary passion (5)
I believe the answer is:
anger
'passion' is the definition.
(I've seen this in another clue)
'rhythmic song releasing primary' is the wordplay.
'rhythmic song' becomes 'ange' (I can't explain this - if you can you should give a lot more credence to this answer).
'primary' says to take the initial letters.
The initial letter of 'releasing' is 'r'.
'ange'+'r'='ANGER'
Can you help me to learn more?
(Other definitions for anger that I've seen before include "Strong displeasure" , "Hostile feeling" , "Incense" , "One of the seven deadly sins" , "exasperation" .)