Present to peacekeeper at summit, brief to this formal legal document (8)
I believe the answer is:
hereunto
'this formal legal document' is the definition.
The definition suggests a singular noun but the answer is not.
'present to peacekeeper at summit brief' is the wordplay.
'present' becomes 'here' ('here' can be similar in meaning to 'present'**).
'to peacekeeper' becomes 'un' (I've seen this in other clues).
'at' says to put letters next to each other.
'summit' becomes 'top' ('top' can be a synonym of 'summit').
'brief' means to remove the last letter.
'top' with its final letter taken away is 'to'.
'here'+'un'+'to'='HEREUNTO'
'to' acts as a link.
Can you help me to learn more?
(Another definition for hereunto that I've seen is " To this point in time (archaic)".)