Provided children, on the day (6)
I believe the answer is:
issued
'provided' is the definition.
The definition and answer can be both to do with communicating as well as being past participle verbs.
Maybe there's a link between them I don't understand?
'children on the day' is the wordplay.
'children' becomes 'issue' (issue can mean someone's offspring).
'on' says to put letters next to each other.
'the day' becomes 'd' (abbreviation for day).
'issue'+'d'='ISSUED'
Can you help me to learn more?
(Other definitions for issued that I've seen before include "Placed in circulation" , "Sent out or distributed" , "Circulated, a statement perhaps" , "Put out (a publication)" , "Published, brought out" .)