Fixturing is not just clamping, it is making specific tools for the job at hand to ensure repeatability and accuracy. Of course it could just be to hold a particularly awkward part.

The best I can recommend is evaluate the books that have a relevant title:

https://www.google.co.uk/webhp?sourc...turing&tbm=bks

Also if you haven't already done so, go through youtube to get ideas.

Regards