Strike back soon over one put away (9)
I believe the answer is:
retaliate
'strike back' is the definition.
(synonyms)
'soon over one put away' is the wordplay.
'soon over' becomes 'reta' (I can't justify this - if you can you should give a lot more credence to this answer).
'one' becomes 'li' (I've seen this in other clues).
'put away' becomes 'ate' (I've seen this in other clues).
'reta'+'li'+'ate'='RETALIATE'
Can you help me to learn more?
(Other definitions for retaliate that I've seen before include "Strike back, avenge" , "Act in revenge" , "Return like for like" , "Repay injury with similar one" , "Get revenge" .)