Arrangement made to nominate people at the end of August (11)
I believe the answer is:
appointment
'arrangement' is the definition.
(thesaurus)
'to nominate people at the end of august' is the wordplay.
'to nominate' becomes 'appoint' ('appoint' can be a synonym of 'nominate').
'people' becomes 'men' (men are people).
'at the end of' suggests the final letters.
The last letter of 'august' is 't'.
'appoint'+'men'+'t'='APPOINTMENT'
'made' is the link.
(Other definitions for appointment that I've seen before include "Post" , "Meeting" , "Date" , "Engagement" , "Job, position" .)