Yes, it's a problem that crops up every now and again. When too much information - ie 'the answer to 6 Down is Banana and you've to enter it backwards, using the Cyrillic alphabet' - was given away, other Forum users would be reluctant to look at the thread in case they saw any spoilers. For a while, there were two threads, one titled 'Listener, May Contain Answers', but this too upset some solvers. My preference is for a thread with hints and nudges, both for the clues and maybe for the theme too.
If people are really stuck and need, want, an answer, maybe they could start a 'Listener, May Contain Answers If Anyone Will Help Me' thread.