Possible Clues:

• Rewards earner, perhaps
• Person with a lot of credit, maybe
• Official when giving a send-off for sevens player
• Place to keep your 'plastic'
• One with credit ... or a literal hint to 17-, 27- and 44-Across
• Paid-up member, which vicar definitely is
• Member
• One who charges purchases
• One using plastic money
• Club member's answer to Christmas display problem