### Clue: Small picture shows day when teachers get more training (5)
### Answer: INSET 
 ### Explanation: Definition: Small picture,day when teachers get more training
 Double defn: 1st: … inserted within the border of a larger one; and 2nd: Acronym for "in-service training" carried out in a period of 5 days in most schools in the UK when teachers do not train but are themselves trained.