1) Assertiveness 2) Continual urging 3) Demand 4) French word used in English 5) Insisting 6) Pertinacity 7) Pressure, of a sort 8) Repeated demands 9) The act or fact of insisting Found on https://www.crosswordclues.com/clue/insistence
In·sist'ence noun The quality of insisting, or being urgent or pressing; the act of dwelling upon as of special importance; persistence; urgency. Found on http://www.encyclo.co.uk/webster/I/69