Was a victim of ill-feeling (5)
I believe the answer is:
ailed
'ill-feeling' is the definition.
The answer and definition are not the same part of speech. However, adjectives and past participle verbs occasionally mean the same thing.
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for ailed that I've seen before include "Felt bad" , "Delia (anag.)" , "Was unwell" , "Didn't feel well" , "Troubled" .)