how to erase text from window

Question

I wanted to make some clicker, and everything has gone easily but, I can't erase text from window. By I can't erase I mean that if i draw some text(int converted to string to be specific). "123" for example. And I want to change that "123" text to new one, let's say "124", the old text is still visible on the window, and I don't know how to erase it. And yes, I've looked for how to do that on internet, but i only found .erase() class and remove_last_char() that doesn't work for me.

I am using the string stream to convert int to string. And i don't think that the code that i am using is necessary here.

Edit - Here's my code(And sorry if i am doing something wrong but i am new to stack overflow):

stringstream scash;    
Text text; 
text.setCharacterSize(16); 
text.setFillColor(Color::White); 
text.setPosition(0, 50); 
text.setFont(font);`  

while (window.isOpen())     
{   
text.setString(scash.str());          
window.clear();         
button.setPosition(W_width / 2, W_height / 2);         
window.draw(button);         
window.draw(text); 
 
    if(//button/mouse collision check here) 
    {       
        if(Mouse::isButtonPressed(Mouse::Left))     
        {       
        cash = cash + 1;        
        scash << cash;      
        } 
    } 
    window.display(); 
}