Assailed heavily with messy bungled ode (10)
I believe the answer is:
bludgeoned
'assailed heavily' is the definition.
Although both the answer and definition are past participle verbs, I cannot see how they can define each other.
'messy bungled ode' is the wordplay.
'messy' is an anagram indicator.
'bungled'+'ode'='bungledode'
'bungledode' with letters rearranged gives 'BLUDGEONED'.
'with' is the link.
Can you help me to learn more?
(Other definitions for bludgeoned that I've seen before include "Hit by stick" , "knocked out" .)