Possible Clues:

• Sports field caretaker
• Fellow following more than one in 26 across doing a job in The Field
• Reason old woman needs new park keeper
• Worker on field has nasty dung on arms
• Worker is after 26 across and leading solicitor for job in The Courts
• Prevents chap from leaving The House after Opposition provides job for someone in the courts
• Maintenance chappie prevents soldier from flying
• One looking after a sports field
• Reason knight, say, could make Lord's tender
• Strands fellow worker in the field