"important hint" is correct and usable in written English.
It is used when providing a clue or suggestion that will help someone do something or make a decision. For example, "Here's an important hint - make sure to read the instructions carefully."
Being there and being alert lets you figure out which stuff the professor finds most important (hint: that's what will be on the exam).
But the document also restates a "definitive commitment" to the peace process and an important hint of flexibility, contained in the qualifier "in the current political context" - suggesting that if the context changed, disarmament might not be impossible.
This is an important hint to explain the formation mechanism of ZnO nano-clips.
Color is an important hint for pedestrian or vehicle tracking/reidentification because of their clothes or bodywork color.
This knowledge gives us an important hint to the development of mechanically-tough carbon fiber without any such local stress concentration on the outer surface part.
This result presents us an important hint that the corrosion resistance of metallic glasses can be improved by elaborately tailoring the defect structure of passive film via proper additions of minor alloying elements.
While the feature importance from the Random Forest can give important hints on the biological properties of the system, it cannot be directly translated to ascertain whether a particular mark is necessary since the redundancy of marks is not considered.
Data on familial recurrence rates of complex diseases such as multiple sclerosis give important hints to aetiological factors such as the importance of genes and environment.
Experts in atmospheric chemistry who were not involved in the study said it offered important hints about hydroxyl radicals, but they emphasized the difficulties in measuring something that comes and goes so quickly and varies mile by mile.
Whatever its practical impact, the decision contained important hints about how the justices will approach the term's more significant Voting Rights Act case: one that concerns Section 5 of the act, which requires jurisdictions with a history of racial discrimination to obtain the federal government's permission before changing voting procedures.
This work provides important hints for devising highly efficient multifunctional flame retardant and broadening the application field of renewable resources.
