If you have a request for a private clan match with DAP-VET send it in the first instance to the leaders of the clan on their PSN ID:
GumGumLuffy
YSHROMLAK-6EEZAK
YE5ROMLAK-6EEZAK
If you don't get a respond e.g. they may be on leave, try other members of the clan. See Members list
Start from members that have DAP-VET-XXX gamertag created as they may be most active ones!