Related Clues:

• One's grabbed by silly arse in lift
• Bishop leads over newspaper that's brought up big payment to banker?
• Extra payment, riding in public transport?
• Improve as cook after starter's rejected
• Welcome and unexpected extra
• Broach
• Hike up
• It sweetens the pot
• Employee extra
• Advance from rear
• Erect; grow
• Tip load under first of bridges
• I entered wreck from rear
• Sound fish to rear
• Produce straight lines, say