You have to simply use
driver.findElement(By.id("com.example.jiteshmohite.ycce:id/password")).clear();
check your xpath id and make sure it is correct.
Here is my code which works for me.
// Create object of DesiredCapabilities class
DesiredCapabilities capabilities = new DesiredCapabilities();
// Optional
capabilities.setCapability(CapabilityType.BROWSER_NAME, "");
// Specify the device name (any name)
capabilities.setCapability("deviceName", "My New Phone");
// Platform version
capabilities.setCapability("platformVersion", "4.4.2");
// platform name
capabilities.setCapability("platformName", "Android");
// specify the application package that we copied from appium
capabilities.setCapability("appPackage", "com.example.jiteshmohite.ycce");
// specify the application activity that we copied from appium
capabilities.setCapability("appActivity", ".LoginActivity");
// Start android driver I used 4727 port by default it will be 4723
driver = new AndroidDriver(new URL("http://127.0.0.1:4723/wd/hub"), capabilities);
// Specify the implicit wait of 5 second
//
driver.manage().timeouts().implicitlyWait(5, TimeUnit.SECONDS);
driver.findElement(By.id("com.example.jiteshmohite.ycce:id/password")).clear();