The most common and most likely answer to this crossword clue is the 9 letter word DECAMETRE
D
E
C
A
M
E
T
R
E
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The straight part
We know that "up to 11 yards?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case up to 11 yards? = decametre.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 DECAMETRE mean?
DECAMETRE noun- An SI unit of length equal to 10-1 metres. Symbol: dam
- A line in a poem having ten metrical feet.
- A poetic metre in which each line has ten feet.