9a: Sandy on margins of energetic sport (4) e-r-; 10a:Minutes before indefinite article in verse form (8) -----c-l; 11a: Den and container losing third of caterpillars (6) l-r-a-; I think it's larval but can't work out why!
1d: One sound lost in another (5) -l---; 2d: Direction to surround, in France, on way to seize power (5) -s---