Possible Clues:

• One type of thinking
• Next Labour leader taking a side
• Died, then rallies? Dispense with fabrication about the side!
• Subsequently a number may be put sideways
• By and by Albert is on the side
• On or to the side
• By and by, a half-century on the 1 down
• Sort of thinking of belonging to the side
• This sideways thinking does not use conventional logic
• A line is added on afterwards, at the side