1) End for part or coal 2) Ending for part or coal 3) Part or add add-on 4) Suffix for aud or trans 5) Suffix with add or part 6) Suffix with exped- 7) Suffix with rend and vend 8) Suffix with rend or vend 9) Tail for a pet Found on https://www.crosswordclues.com/clue/ition
1) End for part or coal 2) Ending for part or coal 3) Part or add add-on 4) Suffix for aud or trans 5) Suffix with add or part 6) Suffix with exped- 7) Suffix with rend and vend 8) Suffix with rend or vend 9) Tail for a pet 
the action of going