The term 'Stroke of the Pen' is a phrase used to describe the act of signing a document or agreement. The two crossword solutions for this term are 'Serif' (5 letters) and 'FLOURISH' (8 letters). A serif is a small line attached to the end of a stroke in a letter or symbol, while a FLOURISH is an ornamental addition to a signature or writing. Together, these two words can be used to describe the act of signing a document with a FLOURISH, which is often seen as a sign of approval or agreement.