A great disruption about liberal, unconfined (7)

I believe the answer is:

atlarge

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'unconfined' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'a great disruption about liberal' is the wordplay.
'disruption' is an anagram indicator.
'about' is an insertion indicator.
'liberal' becomes 'l' (abbreviation).
'great' anagrammed gives 'targe'.
'targe' enclosing 'l' is 'tlarge'.
'a'+'tlarge'='ATLARGE'

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(Other definitions for atlarge that I've seen before include "Unrestrained" , "In general" , "roaming free" , "as a whole" .)

I've seen this clue in The Daily Express.

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