12d Ellis Island (no longer used to welcome US immigrants) - 'eland' (antelope, round) 'l(ake) x 2' + 'Isis' (river)
34a House-warming - 'use' (deployment) + 'war' (in) 'homing' (heading for base)
35d Greengrocer - 'n(ote)' + 'gro(wth)' (50%) (in) 'Greece' + 'r(esurgence)'