A riddle me ree for you from me ?

A riddle me ree for you from me ?

I set you a challenge 
A riddle me ree
If you can work out the answer
Please pm it to me
There isn’t a prize
It is just something to do
In your moments of boredom 
to stop you feeling blue

Okay then the first letter is in the ocean but then again never found in the sea
The second one is in curious
yet it is not in simplicity
Third letter already is always in steady 
Tho it isn’t in fast
Your fourth one is never in first
But it is always in last

Now then four letters you are doing very well
Tho is it correct ? Only time will tell 
So your fifth letter is in chattering
yet it won’t appear in speak
Whilst the sixth one is in nurture
Alas not in bleak
The seventh letter is sitting somewhere in drought
It is also in universe, around and trout
One more letter to go do you know my word
Well this word isn’t silly and it is never absurd

Now then are you ready to complete my word 
Yes you think you have it 
It’s a something that can be herd
So the last letter is in riddle me ree 
As soon as you work it out then pm it to me ?