How is this kanji read?

Eh, wait peko.

I can't read it normally, peko. It is Kanken Level 1 class kanji, isn't it? "Kanken" refers the Japan Kanji Aptitude Test. Level 1 is the most difficult, which even native Japanese can hardly pass. But, this kanji 隙 is actually a level 2 class and is learned in high school.