Sir Lancelot

[totallylost]

Brains gone blank can anyone help.
ACROSS:
1, 16, 25, 26

DOWN:
2, 4, 13,17

Thanks for any help

[Fibonacci]

if you want help remember
When posting a question try to provide .... the full clue including the number of letters and any letters known.
not everyone sits at their computer surrounded by completed crosswords but all are potentially capable of offering you an answer. It is very frustrating when you want to help and are prevented from doing so by lack of provided information.

[Quizzwhizz44]

1ac.wrathful 16ac.one eyed. 25ac self opinionated 26ac dating. 2dn. all hail 4dn. utterly unopposed 17dn epaulet good luck

[totallylost]

Thanks you for your help, I had opinionated but couldn't think of the first word, now all the answers make sense.