How to improvise a press to hold a piece of wood during the time of taking the glue.
Thoroughly clean the parts to be glued.
Adapt the glue to the material and proceed with the gluing.
Present the two parts, taking care to adjust them exactly.
Take a length of string and make two turns around the two pieces to be glued.
Tie it firmly!
Pass a long thin object (pencil, ruler...) between the strings.
Make several turns until you get enough tension.
The strength of this press is high: adjust the tension to not move the bonding.