I don't know how you manage the questions and answers on your trivia bot. You need to figure out how to get the answer into a variable. Then you need to have a !hint command which does this:

Code:
set %trivia.hint 0
set %trivia.char -
msg %trivia.channel Hint: $disphint(%trivia.hint,%trivia.char,%trivia.answer)


Then, you need to start a timer which will call this alias after some length of time:

Code:
inc %trivia.hint 1
msg %trivia.channel Hint: $disphint(%trivia.hint,%trivia.char,%trivia.answer)


-genius_at_work