Possible Clues:

• Daily Chronicle's beginning to get thinner
• Daily reduced calories taking less fat
• The century gets comparatively thin with the help of a washer
• See, it's not so fat so there's little need of a washer
• Daily help
• Part of a night crew
• Conservative's less flabby and less sleazy?
• After a century, one is perhaps more inclined to have had a bath
• More inclined to have a washout by the end of the century
• Having fewer errors, as copy