Spot object that is very angry (8)

I believe the answer is:

seething

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'very angry' is the definition.
'seething' can be an answer for 'angry' (I've seen this in another clue). I'm not sure about the 'very' bit.

'spot object' is the wordplay.
'spot' becomes 'see' (both can mean to notice or observe).
'object' becomes 'thing' (an object is a thing or item).
'see'+'thing'='SEETHING'

'that is' is the link.

Can you help me to learn more?

(Other definitions for seething that I've seen before include "Observe object - bubbling with rage" , "Boiling" , "Extremely angry" , "very hot" , "coming to the boil?" .)

I've seen this clue in the Sydney Morning Herald.

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