Possible Clues:

• Rich person allows pound to be split 50/50
• Split up equally
• Own clothing line is cut by 50%
• Cut by 50%
• ...some lethal version will take out 50%
• Initially having appeared, lax, vague even, share equally
• Divide fairly
• Opposite of "double"
• Divide by two (well divided by five)
• Own around fifty split down the middle