Don't get angry, get this! (4)
I believe the answer is:
even
'this' is the definition.
Both the definition and answer are adverbs.
Perhaps there's a link between them I don't understand?
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for even that I've seen before include "Level, par" , "Flat, regular" , "happening to take time off?" , "That's not odd" , "All square" .)