Please help me to get started!
1a) Invariably happy and extremely lucky to host sibling (12)
3d) One's printed mistakenly in bold (8)
10d) Awfully nice verse about me nursing unknown veterans (2,10)
Sorry for not having any letters. Is 7d) Plain Clothes - clue
7d) He calls into ground after parking, like the CID? (5-7)