Cryptic crossword clue
Oxford martyr cleared with straight line laid down 6

The most common and most likely answer to this crossword clue is the 6 letter word RIDLEY

I've seen this crossword clue in The Guardian
R
I
D
L
E
Y

Buddy explains!

The straight part
We know that "Oxford martyr" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case oxford martyr = ridley.
The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.
This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.

What does RIDLEY mean?

RIDLEY noun
  1. Any of the marine turtles of the genus Lepidochelys, found in the Atlantic and Pacific oceans.

Latest crossword clues with full explanations