Old urgent saying (10)

I believe the answer is:

expressing

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'saying' is the definition.
The definition and answer can be both to do with communicating as well as being present participle verbs.
Maybe you can see a link between them that I don't see?

'old urgent' is the wordplay.
'old' becomes 'ex' (prefix meaning former or onetime).
'urgent' becomes 'pressing' (synonyms).
'ex'+'pressing'='EXPRESSING'

Can you help me to learn more?

(Other definitions for expressing that I've seen before include "Communicating" , "verbalising" .)

I've seen this clue in The Independent.

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