Possible Clues:

• Perishes
• One present often overturned to carry, held by parent
• Soldier in Royal Artillery with gun, retreating
• Uniform — and its wearer?
• Hollow cut in back for uniform
• Artillery weapon upset soldier
• Customer that's habitually appearing in periodical
• Professional soldier’s uniform?
• Uniform -- and its wearer?
• Pull up in back, as frequent pub-goer