Sees red and scraps conserving energy (5)
I believe the answer is:
Here is my best explanation:
'sees red' is the definition.
The answer and definition can be both to do with human feelings as well as being verbs in their -s form.
Perhaps there's an association between them I don't understand?
'scraps conserving energy' is the wordplay.
'scraps' becomes 'rags' (I've seen this before).
'conserving' indicates putting letters inside.
'energy' becomes 'e' (physics symbol as in E=mc2).
'rags' going around 'e' is 'RAGES'.
'and' is the link.
(Other definitions for rages that I've seen before include "gives anger vent", "Passions", "becomes furious", "States of extreme anger", "fits", "Furies", "Shows anger", "speaks as Hitler!", "Fits of temper" and "Storms".)