Possible Clues:

• A second shift, possibly
• Open one myself, though it is extra work
• However long the bowling takes, it pays in the end
• Being Timothy's boss, 'e is working late for this
• Labour's excesses I'm showing up after public enquiry's opening
• Remove it (anag.)
• It's obvious to me I must go in for extra work
• Paycheck padder
• Issue clergyman raised, given nothing initially for extra work
• Additional work due to unexpected item