The phrase "a very clear indication of" is correct and usable in written English.
It can be used when you want to emphasize that something strongly suggests or points to a particular conclusion or fact.
Example: "The results of the experiment provide a very clear indication of the effectiveness of the new drug."
Alternatives: "a strong sign of" or "a definite signal of".
This was a very clear indication of the ability of the egg to repair damaged nuclei.
"I think everyone understand that there will be violence that continues even after elections, but we will have a very clear indication of democratic will.
"We now have a very clear indication of what AOL thinks of the settlement," said Andrew I. Gavil, a professor at the Howard University law school.
At the end of which we have a new No1, a fascinatingly mobile field full of new entries, bolters and tumbling stocks, and a very clear indication of where the power base lies currently in both club and international football.
Crucially, it will give those politicians who are successful on 3 May a very clear indication of what steps they need to take to make older people in their local area happy.
Similarly, guidance from the ICO ought to give a very clear indication of what non-compliance looks like and the circumstances in which enforcement action will be taken against website owners.
But when you see people standing old-school on a box – it was a very clear indication to me of what could happen if you could just distribute that a little better.
"This is a very clear indication that the Bush administration is intending to delay public health protection and that a weakening of the standard is likely," said Erik D. Olson, a senior lawyer with the Natural Resources Defense Council, a research and advocacy group.
"I'm giving you a very clear indication".
The profile of the moisture sorption−desorption isotherm (sharp steps, strong hysteresis between sorption and desorption) is a very clear indication that HH is a "stoichiometric" hydrate.
Mr Swinney expressed a wish for a system "where the chief inspector can consider whether or not there is a case for not having grades, but simply having a commentary which gives very clear indications of what steps are required to improve the performance of that school".
