The Baggies head to Stamford Bridge with a few injury worries and Clarke has revealed that 16-year old starlet Brown will be among the matchday squad to face the Blues in Southwest London.
"We've got some doubts, which is not good because we run with a small squad, but it does open the possibility up that I'll be able to take one or two of the younger members of the squad," said Clarke.
"And, at this moment in time, I'm taking young Izzy Brown, who is a 16 year old.
"He's done fantastic and has come through the youth team, quickly into the Under-21s, and has put on some really good performances recently.
"He might not be involved in the final selection but I think the experience of taking a 16-year-old down to Stamford Bridge will be good for the boy and good for the club."