Related Clues:

• Close attention characteristic of solution
• Grasp of what's going on
• Complete attention
• Mass for The Gathering
• Game with matching tiles
• Long-running show featuring match-makers
• Focusing of attention on density
• Tory money quota gets attention
• Strength of solution from thinking hard
• Understanding; learning
• The process of understanding what's raised for Revenue
• The action of making use of boxer starting off on bit of filming
• At university, accept one may be quick on this
• Mental focus
• Quick on the __ (smart)