The term 'Ache BATTLER' is a combination of two crossword solutions: ASPIRIN (7 letters) and BATTLER (8 letters). ASPIRIN is a medication used to reduce pain, inflammation, and fever. It is commonly used to treat headaches, muscle aches, and other minor pains. BATTLER is a person who fights or struggles against something, such as an illness or an enemy. Therefore, an Ache BATTLER is someone who fights against physical pain and discomfort.