### Clue: Brings back games and increases keenness (6)
### Answer: STROPS 
 ### Explanation: Definition: increases keenness
  **Reversal of**(brings back) SPORTS(a general noun for all sorts of games)
Defn:  To sharpen,increase keenness of a razor by stroking it over a band made of leather or abrasive material.  Can still be seen in old-style barber shops.