Possible Clues:

• Regularity
• One class in agreement
• Overall sameness
• One capturing potentially first class likeness
• Further education class on computer work — why it's monotonous
• In one class where everything is the same
• Garda on street gets it at end of July in harmony
• Class I held in one, in absence of change
• Standard behaviour for me, participating in agreement?
• First class in singular lack of variation long established by 1