Leftie carrying reading matter is excited again (9)
I believe the answer is:
rekindled
'excited again' is the definition.
The definition and answer can be both to do with human feelings as well as being past participle verbs.
Perhaps there's a link between them I don't understand?
'leftie carrying reading matter' is the wordplay.
'leftie' becomes 'red' (red can informally mean a political leftwinger).
'carrying' indicates putting letters inside.
'reading matter' becomes 'kindle' (I can't explain this - if you can you should believe this answer much more).
'red' going around 'kindle' is 'REKINDLED'.
'is' is the link.
Can you help me to learn more?
(Other definitions for rekindled that I've seen before include "Aroused (of former interests)" , "Revived" , "Fired over" , "Invigorated" .)