I presume you mean front der since you talk about it with a crank. It might depend on the vintage of der you have in mind, and at the end of the day, you'll probably just have to give it a try to see if it works well enough for you. The cage for let's say a 10sp front der might be too wide, such that the crank arm will collide with the der cage when shifting into the big ring and might need a good chain catcher to prevent the chain dropping off the inner ring when down shifting. That all assumes friction shifting the front der. I can't imagine too much joy trying to get a Campy 4 click index shift lever to work properly with a front der that has the incorrect cage width or possibly different cable throw.