Hey.

CLAT is an entrance test for admission in 5 year integrated course of law like BA LLB, BBA LLB, BCom LLb etc. This course combines an undergraduation degree with law.

So if you have already completed your graduation, a 3 year LLB degree will be more suitable for you than a 5 year Integrated law course. CLAT is only for 5 year law course and not for 3 year LLb. 

3 year LLB course is more suitable for admission after completion of your graduation. So you can go for various entrances like DU LLb, PU LLb, MH CET, BHU LLB, LSAT, SLAT etc

Best of luck!