Possible Clues:

• Evidence, say, of bitter work unit blocking renovation of Tube
• Overhang in a sports bar?
• Opposite of six-pack abs, ironically
• Always first to get into bar ... which might explain this
• Worker with routine guarding grand corporation
• Woe of a bar habitué
• Drinker's obvious hangover?
• Corporation worker beginning to get into routine
• Be tense suppressing awful urge for pot
• The ever-expanding Carlsberg Corporation?