Related Clues:

• Train from Waterloo, maybe, heading north to save time
• SAT prep instructor, perhaps
• Teacher’s mild rebuke over contents of work
• Test coach
• Teacher's sound of disapproval, getting zero response at first
• Give individual instruction
• Coach backing team's beginning to tuck into grub
• Teacher turned hint of triumph into defeat
• Teacher's badly out, entering first two consonants in turn
• Teacher's expression of disapproval over arithmetic, perhaps
• Coach tour rearranged to take in Turkey's capital
• Member of school of trout swimming
• Test prep aid
• Mentor cooked trout
• Private educator