Possible Clues:

• One has a will of one's own
• Will signatory try to get roster back?
• Will composer try album-oriented rock? That'll consume time
• Person leaving cricket match at Oval before end of over
• He's willing to check rota out
• Will producer examine a rocky hill?
• The one who makes a will
• One leaving land, perhaps, with river on a hill
• One willing to try schedule after turning back
• One with a will to help others succeed?