Function Get-SomeData {
    Clear-Host
    $somedata="somedata"
    return $somedata
}

$myData = Get-SomeData

$myData[0]     # will clear the screen
$myData[1]     # "somedata"
$myData.Count  # will be 2

Function should return a single value ("somedata")

Function returns an array with the Clear-Host command as the first object