Possible Clues:

• Slow on the ___ (unintelligent)
• Grasp of what's going on
• Understanding; learning
• The process of understanding what's raised for Revenue
• At university, accept one may be quick on this
• Quick on the __ (smart)
• Using something available
• Some people are slow on this assuming it might produce a scene after a wake?
• Level of acceptance of an optimistic outlook
• Ability to understand what is meant - some are slow on it