A level of frustration is behind dispute primarily for compensation (15)
I believe the answer is:
dissatisfaction
'a level of frustration is behind dispute' is the definition.
I can't judge whether this definition defines the answer.
'primarily for compensation' is the wordplay.
'primarily' becomes 'dis' (I can't justify this - if you can you should give a lot more credence to this answer).
'for' is a charade indicator (letters next to each other).
'compensation' becomes 'satisfaction' (satisfaction is a kind of compensation).
'dis'+'satisfaction'='DISSATISFACTION'
Can you help me to learn more?
(Other definitions for dissatisfaction that I've seen before include "unhappiness" , "Discontent; uneasiness" .)