Behaviour, score = 16 + 2 = 18, cracked by Makonede

@(type:type)-0

just use a language that nobody knows amiright ;)

• 2 characters removed
• current output: func
• desired output: fun

hint:

type is an embeded function that returns the type of a variable. Using type on type results in "cfunc"

The rest of the technics used are on the docs.

I could have made it smaller but the allure of having the output be fun was too great.