Started when victory overturned last month (6)
I believe the answer is:
winced
'started' is the definition.
The definition and answer can be both to do with motion as well as being past participle verbs.
Perhaps there's a link between them I don't understand?
'victory overturned last month' is the wordplay.
'victory' becomes 'win' (a win is a victory).
'overturned' is a reversal indicator.
'last month' becomes 'dec' (December, last month of the year).
'dec' written backwards gives 'ced'.
'win'+'ced'='WINCED'
'when' is the link.
Can you help me to learn more?
(Other definitions for winced that I've seen before include "Grimaced slightly" , "Flinched, cringed" , "Made slight involuntary movement from pain or embarrassment" , "Flinched, made a face" .)