Total collapse is sadly disorientating (14)

I believe the answer is:

disintegration

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'total collapse' is the definition.
'disintegration' can be an answer for 'collapse' (thesaurus). I am not certain of the 'total' bit.

'sadly disorientating' is the wordplay.
'sadly' indicates an anagram.
'disorientating' anagrammed gives 'DISINTEGRATION'.

'is' acts as a link.

Can you help me to learn more?

(Other definitions for disintegration that I've seen before include "Falling apart" , "Process of breaking up" .)

I've seen this clue in The Telegraph.

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