The term 'pirate flag depiction' refers to a common image used on pirate flags, which typically consists of a white SKULL and crossbones on a black background. This image is often referred to as the Jolly Roger, and it is usually accompanied by two crossed BONES beneath the SKULL. The crossword solutions for this term are 'BONES' (5 letters) and 'SKULL' (5 letters). The BONES and SKULL together form the iconic image of the Jolly Roger, which has been used by pirates since the early 18th century.