| Rating | Solver | Clue |
|---|---|---|
| VOLUNTARY | Optional | |
| INESSENTIAL | Optional | |
| ELECTIVE | Optional (surgery) | |
| ADDONS | Optional items | |
| OPTIONALLY | In an optional manner. | |
| SELECTIVE | Demanding schools instigate optional subject | |
| EXTRA | Optional addition of uncredited actor | |
| EXTRAS | Optional accessories for crowd-scene actors | |
| OPTIONAL | Involving an option; depending on the exercise of an option; left to one's discretion or choice; not compulsory; as, optional studies; it is optional with you to go or stay. | |
| PASS | To decline to take an optional action when it is one's turn, as to decline to bid, or to bet, or to play a card; in euchre, to decline to make the trump. | |
| FEE | ...o be rendered; especially, payment for professional services, of optional amount, or fixed by custom or laws; charge; pay; perquisite; as, the ... | |