Possible Clues:

• The __, Orson Welles film written by Graham Greene
• Fielding character, mysterious one in movie
• Classic Orson Welles film, with 'The'
• Not the first person to patrol the boundary?
• Abel's position in the field?
• Cricket fielder - 'The ___' (Orson Welles film)
• One may dismiss or replace an opener
• Philby seen in the field
• Harry Lime's position in the field
• Slips up ahead of him