### Clue: Legal statement by Welby, maybe as a precaution (4,2,4)
### Answer: JUST IN CASE 
 ### Explanation: Definition: as a precaution
 CASE(a legal statement/an agreed summary of the facts relating to a legal case put up for consideration by a higher court) **placed after**(by) JUSTIN(Welby, the Archbishop of Canterbury for example/maybe).