"My Dear Watson"

This is #4 of our "Curious Conundrums" series.

Don (his idea and grid) and I thought some of you (esp you, Tinbeni, Happy Birthday!) might be amused by this punny theme. I don't recall seeing similar gimmick in any major newspaper before. The fact that the answers sound too much alike makes it unsuitable for publication.

Our clue for 16-Across is rather long and Across Lite can't handle it. Just click View, then Notepad. You should be able to read the whole clue.

Puzzle:

Here is puz file (Across Lite).

Here is PDF.

Spoiler: Here is the answer grid.

Thanks for solving and do let us have your comments.

C.C.