Hi, I've attached a client script to my SS2.0 suitelet using

form.clientScriptModulePath

I'm able to see

pageInit

function triggered in browser when the suitelet is rendered. How do I call a CS custom function from within the suitelet?

Your client script will have to return the custom function, just like it returns the pageInit function.

Yes, the script returns the custom function, but what's the scope to call it? I mean, the

pageInit

function call is part of the stardard flow, no need to write anything in suitelet. But how/where do I call the custom function in suitelet?

What event/action/trigger do you want to invoke your custom function?