Self-promotion developed fully, with energy rising (3,4)
I believe the answer is:
ego trip
'self-promotion' is the definition.
(an ego trip is something for one's own benefit)
'developed fully with energy rising' is the wordplay.
I cannot really see how this works, but
'developed' could be 'got' ('get' can be a synonym of 'develop') and 'got' is located in the answer.
'energy' could be 'e' (physics symbol as in E=mc2) and 'e' is present in the answer.
The remaining letters 'rip' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for ego trip that I've seen before include "Something increasing one's self-importance" , "Self-important actions" , "totally selfish" , "Self-important action" , "Exercise in self-indulgence" .)