Possible Clues:

• In Ireland, in short, in church, in short, in short
• 25.4 millimetres
• Bird (not strong) found on Scottish island
• Home to church is a short distance
• Stubborn people won't give one
• Worm size
• In for short for what's short
• Unit indicated by '
• Advance at a snail's pace
• Move slowly at the altar, perhaps?