### Clue: Comply with note to watch clock (7)
### Answer: OBSERVE 
 ### Explanation: Definition: Comply with,note,to watch,clock
 Quadruple defn: 1st: …, as in "you have to observe the rules of the house"; 2nd: To …/to make an observation/draw attention to, as in "the members did observe that certain parties were absent"; 3rd: … carefully, as in "you should observe what the teacher is doing"; and 4th: …, informal term for "to notice".