In the Civil War, his anger carried weight (6)
I believe the answer is:
ireton
'in the civil war his' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.
'anger carried weight' is the wordplay.
'anger' becomes 'ire' (ire is intense rage).
'carried' says to put letters next to each other.
'weight' becomes 'ton' (ton is a kind of weight).
'ire'+'ton'='IRETON'
Can you help me to learn more?
(Another definition for ireton that I've seen is " General".)