Rising up, concerned with election process bringing in left (9)
I believe the answer is:
revolting
'rising up' is the definition.
(revolting is a kind of rising up)
'concerned with election process bringing in left' is the wordplay.
'concerned with' becomes 're' ('re' means regarding or about).
'election process' becomes 'voting' (I can't justify this - if you can you should believe this answer much more).
'bringing in' is an insertion indicator.
'left' becomes 'l' (common abbreviation).
'voting' placed around 'l' is 'volting'.
're'+'volting'='REVOLTING'
Can you help me to learn more?
(Other definitions for revolting that I've seen before include "Disgusting" , "Repulsive" , "rioting" , "Rising in rebellion" , "Loathsome" .)