Making one feel there's point to the cause (7)
I believe the answer is:
emotive
'making one feel there's point' is the definition.
I can't judge whether this defines the answer.
'to the cause' is the wordplay.
'to the' becomes 'e' (I can't justify this - if you can you should give a lot more credence to this answer).
'cause' becomes 'motive'.
'e'+'motive'='EMOTIVE'
Can you help me to learn more?
(Other definitions for emotive that I've seen before include "Generating feelings" , "Deeply felt" , "Affecting, moving" , "Contentious" , "arousing passion" .)