Possible Clues:

• Doubter of God
• Noncommittal, in a way
• One questioning what's in mailbag -- no stickers?
• Doubting, non-commital
• In a religious sense, he believes in coasting freely
• Sceptic acting so oddly
• Sceptical, a number turning back on little jerk
• Action's modified to get to grips with golf? One's sceptical
• Sceptic acting so strangely
• I doubt starter of gin and tonic as bad