Related Clues:

• Cast not one before May is out
• Liquid from fruit and vegetable
• What a blow for the oaf after a century
• Not in a century and a half at last, blow it!
• To strike like this won't get it in the end
• A century and a half not in the blow
• What a blow not to be within a century and a half
• Behold what's in the wound from the blow
• Clout, slangily
• Influence ... and a hint to 20-, 26-, 46- and 56-Across
• Powerful influence
• Influence cast after May 31
• See 22
• Hit 150 before getting dismissed
• Hit nail on the head of clumsy oaf