Crossword Genius

Norse god in request for feast (8)

Ross

I believe the answer is:

plethora

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'feast' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.

'norse god in request' is the wordplay.
'norse god' becomes 'thor' (Thor is an example).
'in' is an insertion indicator.
'request' becomes 'plea' (plea is a kind of request).
'thor' placed inside 'plea' is 'PLETHORA'.

'for' is the link.

Can you help me to learn more?

(Other definitions for plethora that I've seen before include "opposite of scarcity" , "'Large, perhaps excessive, amount (8)'" , "Unnecessarily large quantity" , "Superabundance" , "Oversupply" .)

I've seen this clue in The Telegraph.
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