Undoing jar, circulating, then suspending (10)

I believe the answer is:

adjourning

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'suspending' is the definition.
The definition and answer can be both related to change as well as being present participle verbs.
Maybe they are linked in a way I don't understand?

'undoing jar circulating' is the wordplay.
'circulating' is an anagram indicator.
'undoing'+'jar'='undoingjar'
'undoingjar' is an anagram of 'ADJOURNING'.

'then' is the link.

Can you help me to learn more?

(Another definition for adjourning that I've seen is " Postponing".)

I've seen this clue in The Daily Express.

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