1a Private sails, leaving harbour at first with opponents aboard. (6)
??O??S (clue length might be 8 letters as some clues have 2 extra letters in the answer)
36a Yankee's held by king battling for English (8, 3 words) ???A?E??
1A. Def is 'private'.
You need a 5 letter word meaning sails, but minus the H.
Then put this round 2 letters that mean opponents in bridge.
But, there's a clash in the final entry.