The phrase "a tricky question for" is correct and usable in written English.
It can be used when introducing a question that may be difficult or challenging for someone to answer.
Example: "This is a tricky question for anyone who hasn't studied the topic in depth."
Alternatives: "a challenging question for" or "a difficult question for".
I asked Mr. Foley if Goldfish with organic wheat was any healthier than the regular kind, a tricky question for an executive at a large food company to answer.
The matter of golden-wing/blue-wing genetic similarity may pose a tricky question for the American Ornithologists Unionn, too, should its North American Classification Committee be asked to consider this evidence in a proposal to lump golden-wings and blue-wings into a single species.
Patriotism, when it comes to alcohol brands, is a tricky question for American consumers.
This is a tricky question for many people in recovery -- and it can come across as invasive even if you have the best of intentions.
From teetotaling Baptists to Episcopalians who uncork champagne in the parish hall, what to do with the bottle can be a tricky question for religious groups to answer -- especially during holy periods or holidays.
But it is a tricky question even for us.
But the most interesting thing about the list is how far down all the current Republican proposals rate with "The American People" (with the one big exception being getting rid of earmarks, which is often a tricky question -- most people are for cutting earmarks for all the other districts and states, but most people are also in favor of such for their state or district).
That poses a particularly tricky question for Democrats in swing districts who are prime targets for Republican challengers next year: whether to support the cap-and-trade package.
He had prepared an especially tricky question for her, involving the particulars of Montenegrin geography.
