Clue: Perhaps Bruce doubles as 6's relative (6)
Answer: KENKEN
Explanation: Perhaps Bruce doubles as 6's relative (6)
**KEN** (perhaps Bruce) [*doubles*] 
 
 
*Ken Bruce is a Radio 2 DJ and KenKen is a small grid puzzle that uses mathematics and logic, akin to SuDoku, although SuDoku requires no mathematics.