NEW YORK CITY — Law firm Cohen Clair Lans Greifer & Simpson LLP has signed a 17,862-square-foot office lease at 919 Third Ave. in Midtown Manhattan. The lease term is 10 years. The 47-story, 1.5 million-square-foot building was originally constructed in 1970 and recently underwent a capital improvement program. Robert Alexander, Ryan Alexander, Emily Chabrier, Taylor Callaghan, Alex D’Amario and Nicole Marshall of CBRE represented the landlord, SL Green, in the lease negotiations. Craig Reicher and James Ackerson, also with CBRE, represented the tenant.