Possible Clues:

• Sat around to help relatively little (6)
• Be a big brother to
• Give a hand to get the fool to sit
• Pitch in when leader abandons string player
• Pass before a goal
• Baseball, basketball and hockey term
• Help the fool not to sit straight
• Silly to sit like that. Can one help it?
• Boost, perhaps
• Support posterior and sit awkwardly