Announced treaty and prepared for holiday (6)
I believe the answer is:
packed
'prepared for holiday' is the definition.
The answer and definition can be both to do with social activities as well as being past participle verbs.
Perhaps they are linked in a way I don't understand?
'announced treaty' is the wordplay.
'announced' indicates a 'sounds like' (homophone) clue.
'treaty' becomes 'pact' (synonyms).
'pact' is a homophone of 'PACKED'.
'and' is the link.
Can you help me to learn more?
(Other definitions for packed that I've seen before include "Placed clothes etc in suitcase" , "Crowded" , "Enveloped" , "Arranged clothes in suitcase for travelling" .)