16d (3 and 3 and 4). Apex of ambitious achievement is largely temporal ??? and ??? and TIME 6d (8 letters). Strap in a befuddled striver ?N?????T Third final letter is R or A 10a (8 letters). Secret...
28 across. 10 letters Nuts, a dingo gone nutty ? Incredible ! -------i-g 19 down 8 letters Isnt it the choice of a nisguided EEC to nil ? E------- . ( Is it European ? )
23 across / 6 letters -a-e-e Type of flowering in which blossoms are borne along the main stem. 6 down/ ( 5,3 ) -l-i- air in fine arts , the quality of light and atmosphere out of doors.