1) Assume sponsorship of 2) Back up 3) Buy at 4) Do business with 5) Frequent 6) Patronize 7) Shop 8) Shop at 9) Sponsor 10) Support 11) Treat condescendingly Found on https://www.crosswordclues.com/clue/patronise
[Verb] To treat someone in a condescending way, as if you are lowering yourself to talk to them. Example: I felt patronised by the way the doctor treated me in the surgery.
Found on http://www.bbc.co.uk/skillswise/glossary/