1) US visitor since 1976 2) Aerial clipper 3) Aerospatiale product 4) Air France fleet component 5) Air france fleet member 6) Air France flier 7) Air France flier until 2003 8) Air France flier, once 9) Air France plane, once 10) Air France vehicle 11) Air show giant 12) Airport sight 13) Arrival at Heathrow Found on https://www.crosswordclues.com/clue/sst
(In topic `Security`) SST (Secure Transaction Technology) is a secure payment protocol developed by Microsoft and Visa to work in conjunction with the PCT protocol (see PCT). Found on http://www.encyclo.co.uk/local/20477