Fashion gala in Olde England (6)

I believe the answer is:

anglia

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'england' is the definition.
(I've seen this before)

'fashion gala in' is the wordplay.
'fashion' is an anagram indicator.
'gala'+'in'='galain'
'galain' anagrammed gives 'ANGLIA'.

'olde' is the link.
This may not be correct. It may be part of another bit of the clue.

Can you help me to learn more?

(Other definitions for anglia that I've seen before include "Eastern part of England" , "East -, former Saxon kingdom" , "See 10" , "old car" , "Old Ford and eastern England region" .)

I've seen this clue in The Guardian.

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