How to enable a submenu ?

Hi, i want give to a role the capability to edit menus,

however “menu” is inside “appearance” and i just want to allow him to touch the menu, and nothing else,

not the theme, not customize, not to touch the widgets or the editor,

i tried all the options i have and i dont success to enable just the menu for a given role,

anyone can point me to the way this must be done?

thanks a lot