Sound of charger perhaps seizing victory after I launch attack (7)
I believe the answer is:
inveigh
'sound of charger perhaps' is the definition.
I can't judge whether this definition defines the answer.
'seizing victory after i launch attack' is the wordplay.
'seizing' is an insertion indicator.
'victory' becomes 've' (VE is short for Victory in Europe).
'after' means one lot of letters go next to another.
'launch attack' becomes 'nigh' (I can't justify this - if you can you should give a lot more credence to this answer).
'i' next to 'nigh' is 'inigh'.
've' put within 'inigh' is 'INVEIGH'.
Can you help me to learn more?
(Other definitions for inveigh that I've seen before include "Rail bitterly" , "Attack violently or bitterly in words" , "Speak violently" , "Revile, rail" , "Complain bitterly (against)" .)