Margaret A.(Basile) Harrison;80;of Belle Vernon;died Saturday;May 17;1997;at 6 a.m.in South Hills Convalescent Center following a lengthy illness.  Born April 18;1917;in Belle Vernon;she was the daughter of the late Joseph and Sarah Rodgers Basile.  Mrs.Harrison was a member of Pricedale Union Church and the Belle Vernon Order of the Eastern Star.  Surviving are her husband;John Jack Thomas Harrison;four brothers;James;Rohland;Ross and Anthony Basile;all of Belle Vernon and one sister;Mary Mate of Pittsburgh.  Friends will be received Monday from 2 to 4 and 7 to 9 p.m.and Tuesday until 11 a.m.in the Eley-McCrory Funeral Home Inc.;334 Mains St.;Fayette City.  Services will be held Tuesday at 11 a.m. in the funeral home with Pastor James Mimidis of Pricedale Union Church officiating.  Interment will follow in Belle Vernon Cemetery.  Arrangements are being handled by the Eley-McCrory Funeral Home Inc.