Christine, on return, referring to national emblem (6)

I believe the answer is:

keeler

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'christine' is the definition.
Both the answer and definition are singular nouns.
Perhaps there's a link between them I don't understand?

'return referring to national emblem' is the wordplay.
'return' says the letters should be written backwards.
'referring to' becomes 're' ('re' means regarding or about).
'national emblem' becomes 'leek' (I've seen this before).
're'+'leek'='releek'
'releek' reversed gives 'KEELER'.

'on' acts as a link.

Can you help me to learn more?

I've seen this clue in The Independent.

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