If you look at the left side of the page you will see Search Crosswords. You can enter certain words or phrases contained in your question and click GO for the results.
I should say that this some work going on at this site, and it isn't completely reliable at the moment.
Cheers geo.0939.
I don't know where I got the idea from, but I thought any answers triggered off an e-mail from A/B saying that there was a reply. Alternatively, it looks as if all initial postings are numbered, and it may be possible to keep a note of the number, if that would speed tracing it.
Perhaps someone with greater familiarity with A/B will be willing to comment.