MM. The 11 letters go from the bottom left, diagonally.
I A is thematic.
9 A. Is just the name of a fish. It's a hidden in the clue one, remembering that letters can be added/taken away.
11 A Thematic.
11 A and D, in that order, gives the name of a famous ....(check the date of the puzzle).
1 A links with 4 Down, to give another example.
13 D is the start of another example... (I think earlier hints have shown what the entry is there.)
Orson - and anyone else - I'm so sorry about my earlier misleading/wrong post. I don't know what I was thinking, probably trying too hard not to give too much away.