Stuck on 2
10ac - I'm secured by soldiers, having invaded roughly.(6) - ?r???a
7d - Attractive partner can start to dance amongst troops.(3,5) - a?? ?a?d?.
The 4th letter of 10ac is the 3rd letter of 7d
Concerning CRIMEA, in this clue, the whole of the clue is both wordplay and definition. This kind of clue is sometimes called an "all-in-one" or "&lit" clue.