Core of media board can be changed (8)

I believe the answer is:

editable

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'changed' is the definition.
Both the definition and answer are adjectives.
Perhaps you can see a link between them that I can't see?

'core of media board' is the wordplay.
'core of' means to look at the middle letters.
'board' becomes 'table' (both can mean food).
The middle letters of 'media' are 'edi'.
'edi'+'table'='EDITABLE'

'can be' acts as a link.

Can you help me to learn more?

(Another definition for editable that I've seen is " Subject to change".)

I've seen this clue in The Irish Times.

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