13 across. Some leave when one's not at one's best(3,3) Sorry, no letters.
1 across. How chess is played in general (6,3,5) ?????S/???/?????
18 across. Carefully selected husband together with old Scotsman being mentioned (4-6) ????/??C???
8 down. Delight a player that's puzzling? Most solvers have it! (5,9)
?????/?E???R???
28 across. Performing alone, Simon somehow obtains part in South Pacific (7,7) S??????/???A???
Thank you.