Noted camper's rear framed in plastic tent window (7,4)

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

'camper's rear framed in plastic tent window' is the wordplay.
'rear' indicates one should take the final letters (the back of the word).
'framed in' means one lot of letters goes inside another.
'plastic' indicates anagramming the letters (plastic can mean easily moulded).
The last letter of 'camper' is 'r'.
'tent'+'window'='tentwindow'
'tentwindow' with letters rearranged gives 'wittendown'.
'r' going into 'wittendown' is 'WRITTEN DOWN'.

Can you help me to learn more?