The term 'Flat Fixer' refers to a person who is responsible for repairing flat tires. The crossword solutions for this term are 'SUPER' and 'PATCH'. SUPER is an abbreviation for 'SUPERINTENDENT', which is a job title for someone who is in charge of a particular area or department. PATCH is a verb meaning to repair or mend something, usually with a piece of material such as cloth or leather. Therefore, the term 'Flat Fixer' can be defined as a SUPERINTENDENT who is responsible for patching and repairing flat tires.