Wager soldiers kill over disloyalty (9)

I believe the answer is:

betrayals

'disloyalty' is the definition.
(I know that betrayal is a type of disloyalty)

'wager soldiers kill over' is the wordplay.
'wager' becomes 'bet' (synonyms).
'soldiers' becomes 'RA' (abbreviation for Royal Artillery).
'kill' becomes 'slay' (slaying is a kind of killing).
'over' shows that the letters should be reversed in order.
'slay' backwards is 'yals'.
'bet'+'ra'+'yals'='BETRAYALS'

I've seen this clue in The Daily Express.

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