14 Across, Detective was wrong,becoming discouraged (8)
15 Across, Full one tucking into 6?not wholly (6)
(6 = English racecourse displacing first-rate course (6) )
1 Down, Item of mail getting new staff very upset in the middle of week (8)
4 Down, Record's king's time in power getting cut short (8)
Compiler - PHI
Many thanks