Complex sentence: Stephen Lipson, one of Horn's established studio engineers, took his place, but the delay meant that Propaganda's second single, the more pop-oriented "Duel", didn't surface until April 1985.
Split into simpler sentences: Stephen Lipson, one of Horn's established studio engineers, took his place. As a result Propaganda's second single, the more pop-oriented "Duel", didn't surface until April 1985.