Solid has this diminished, torn asunder (5,9)

I believe the answer is:

third dimension

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

'diminished torn asunder' is the wordplay.
'asunder' indicates anagramming the letters (I've seen this in other clues).
'diminished'+'torn'='diminishedtorn'
'diminishedtorn' anagrammed gives 'THIRD DIMENSION'.

'has this' is the link.
This may not be correct. Some or all of it may be part of another bit of the clue.

Can you help me to learn more?

(Other definitions for third dimension that I've seen before include "Solid" , "Thickness" .)

I've seen this clue in The Independent.

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