clues for corresponding entries are paired in alphabetical order,solvers must deduce which answer goes into which half of the grid.Some answers are modified to make other words.The nature of the modification determines which half the answer goes into.Clues to the remaining answers each contain an extra word or phrase defining one of the words from the modification.
!5d PT1 One fault finder who has to decide slowly (5)
Having the clue Is not always that helpful, these puzzles tend to need someone who has done it, or who is doing it Cheers!