Philosophical about England's case given improvement? (10)

'given improvement?' is the definition.
The definition and answer can be both to do with creating things as well as being past participle verbs.
Perhaps there's a link between them I don't understand?

'philosophical about england's case' is the wordplay.
'philosophical' becomes 'resigned' (I've seen this before).
'about' indicates putting letters inside.
'case' says to hollow out the word (remove centre letters).
'england' with its centre removed is 'ed'.
'resigned' enclosing 'ed' is 'REDESIGNED'.

Can you help me to learn more?