Skaters.

There are seven skaters and every minute the first one goes to the last place.

So, at start the order is :

$P, Q, R, S, T, U, V$

Now, after seven minutes again the original order comes. That is after seven minutes the order will be :

$P, Q, R, S, T, U, V$

So, after 8 minutes the order becomes :

$V, P, Q, R, S, T, U$

And, after 9 minutes the order will be :

$U, V, P, Q, R, S, T$

$\color{#20A900}\text{Therefore, after 9 minutes T will be in the front.}$