Crossword Genius

Oddball farmer consumed by tweet is unlikely to ever thaw out (10)

Ross

I believe the answer is:

permafrost

I'm a little stuck... Click here to teach me more about this clue!

'unlikely to ever thaw out' is the definition.
I can't judge whether this definition defines the answer.

'oddball farmer consumed by tweet' is the wordplay.
'oddball' indicates an anagram (I've seen this in other clues).
'consumed by' is an insertion indicator.
'tweet' becomes 'post' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'farmer' anagrammed gives 'ermafr'.
'ermafr' inserted within 'post' is 'PERMAFROST'.

'is' is the link.

Can you help me to learn more?

(Other definitions for permafrost that I've seen before include "Ground never thawing" , "Ground frozen for a long time" , "Hard layer" , "feature of polar regions" .)

I've seen this clue in the Irish Times.
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