Oriental cooking? That'd be telling! (8)

I believe the answer is:

relation

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

'oriental cooking?' is the wordplay.
'cooking?' is an anagram indicator (I've seen 'cooking' mean this).
'oriental' anagrammed gives 'RELATION'.

'that'd' acts as a link.
I am not very happy about this link. It may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for relation that I've seen before include "Kin" , "Eg, father" , "Person related by blood or marriage" , "Telling" , "Auntie?" .)

I've seen this clue in The Independent.

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