Yes you can join Delhi university after 5 years gap but there is some procedure for this. You have file proper documents for the admission.
The rules vary from college to college.
According toast year prospectus details we found that-
You can also read FAQ here- http://www.ug.du.ac.in/app2/index.php/site/faq
You might have to submit an affidavit for this.
It is advisable that you must go for some career oriented professional course and can peruse your graduation side by side via SOL that is correspondence courses from Delhi University.
Get complete details here- https://admission.aglasem.com/du-sol/
All the best.