It's prepared to bring back capital growth (4-8)

'growth' is the definition.
Both the definition and answer are singular nouns.
Maybe there's a link between them I don't understand?

'it's prepared to bring back capital' is the wordplay.
I cannot quite understand how this works, but
'it's' could be 'es' ('e' can mean 'electronic' which is similar to 'IT') and 'es' is located in the answer.
'to' is within the answer.
'capital' could be 'ai' (resembles 'A1', old-fashioned term for excellent) and 'ai' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?