Can one be average in academics but great in research at same time in PhD
What i wanted to ask how much of PHD is about creativity and how much
  is about perserverance and how much is it about academics


The snarky answer is: Yes. 

A slightly more unpacked version of this in no particular order would be: 

Academics (aka things you learn in courses) is important because we don't create in a vacuum. We invent new things, but also combine old things in clever ways, or modify others' ideas creatively for new purposes. Think of it as one component of the fuel for your creativity: why ignore it ?

Creativity is of course the key to doing something new, which is the most basic requirement for completing a Ph.D. 

Perseverance is incredibly important, because most ideas don't come into your head fully formed and perfect. It may be that your first 10, or 100, or 200 ideas aren't quite right, but by studying them closely, and seeing what works and what doesn't, you're able to produce a genuinely interesting new piece of work. Slogging through the bucket of non-working ideas takes perseverance, and can't be replaced by anything else.