Mike, yeah a closed induction kit with a scoop will definitely not let hot air in, youre right.
My definition of induction kit is an open cone filter of some kind with a couple of crappy bits of pipe that dont fit properly and blow cold air roughly in the direction you want while all the while the hot air circulating around the engine bay is being drawn through the filter in much greater quantities.
Any induction kit like this can have as many external air feeds as you like, but if the filter itself is not sealed from engine heat then its not much good.
Your Clio should, if I remember right, have the cylindrical airbox then two pipes running down above the wheelarch just under the headlight. Theres a small kind of scoop thing there where the two pipes join up? At least thats what I remember from a Mk 1.
The Clio Cup cars have a bigger scoop with one big bore outlet, the scoop itself is much more forward under the headlight.