Alberta agrees finally to study diamonds editor took off (9)
I believe the answer is:
absconded
'took off' is the definition.
The answer and definition can be both to do with motion as well as being past participle verbs.
Perhaps there's an association between them I don't understand?
'alberta agrees finally to study diamonds editor' is the wordplay.
'alberta' becomes 'ab' (I can't justify this - if you can you should believe this answer much more).
'finally' indicates one should take the final letters.
'to study' becomes 'con' (con can informally mean to study).
'diamonds' becomes 'd' (abbreviation in bridge say).
'editor' becomes 'ed' (abbreviation).
The final letter of 'agrees' is 's'.
'ab'+'s'+'con'+'d'+'ed'='ABSCONDED'
Can you help me to learn more?
(Other definitions for absconded that I've seen before include "Escaped" , "Left to avoid arrest" , "Bolted, made off" , "took French leave" , "Ran away to avoid legal process" .)