Print out the DNA piece together with the clip, connect together at the central point (using a gas torch to seal together), then clip between two pieces of clothing.

The support material can be removed after printing if desired. The connecting base pairs may be tricky to print if you have a slightly dodgy printer.

Initial model: helix only
update 1: added clip hole and support structure to DNA, added clip
update 2: simplified clip to a solid cylinder join -- flexible join was too difficult to print