Navy fur wraps to acquire as new? (4-5)

'new?' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?

'navy fur wraps to acquire' is the wordplay.
'navy' becomes 'RN' (abbreviation for Royal Navy).
'fur' becomes 'boa' (a boa is an item of fur neckwear).
'wraps' means one lot of letters goes inside another (inserted letters get wrapped up).
'to acquire' becomes 'gain' (gaining is a kind of acquiring).
'rn' inserted inside 'boa' is 'borna'.
'borna'+'gain'='BORN-AGAIN'

'as' acts as a link.

Can you help me to learn more?