### Clue: Insecure due to missing first of January, perhaps I visited holiday resort (2,4,3)
### Answer: ON THIN ICE 
 ### Explanation: Definition: Insecure
  ONTH{"month",of which January is an example,perhaps, **minus**(missing) first letter "m"} I **plus**(visited) NICE(holiday resort town in the French Riviera)