Donkey jumped over five ducks and attacked (9)
I believe the answer is:
assaulted
'attacked' is the definition.
('assault' can be a synonym of 'attack')
'donkey jumped over five ducks' is the wordplay.
'donkey' becomes 'ass' (ass is a term for a donkey).
'jumped over' becomes 'vaulted' (I've seen this before).
'five' becomes 'V' (Roman numeral).
'ducks' is a deletion indicator (some letters duck out of the word).
'vaulted' with 'v' removed is 'aulted'.
'ass'+'aulted'='ASSAULTED'
'and' is the link.
(Another definition for assaulted that I've seen is " Attacked violently".)