Possible Clues:

• Worker on newspaper once reviewing poor sitcom
• Worker in print company ordered import covering operating system
• Iodine found in organic material around river employed in the print shop in the past
• One is consumed by pile in the farmyard - initial odour is never-ending and affects what's going on in printworks
• Old matter encapsulates current and old writing by typesetter
• I make type of mixture with gold, incorporating iodine
• Mulch over first person or typesetter
• Batty admirer, would-be lover, non-U type is set up by him
• Terribly poor sitcom I set in print room
• Print worker's firm may initially be in deprived environment