Related Clues:
- Extra, and this puzzle's title
- Computer expansion card
- Build an annex
- Enlargement
- Optional item as supplement or increment
- Something attached
- Mix with
- Include one divine in there (3, 2)
- Extra commercial to put on
- Peripheral vision at last following key depth function
- Time put in to succeed with delivery in football
- Fracas interrupts fine play in football match
- Accessory device
- Supplementary item
- Feature supplementing standard model