Cryptic crossword clue
Invaluable island home — I have the capacity 11

The most common and most likely answer to this crossword clue is the 11 letter word INESTIMABLE

I've seen this crossword clue in The Daily Telegraph
I
N
E
S
T
I
M
A
B
L
E

Buddy explains!

The straight part
We know that "Invaluable" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case invaluable = inestimable.
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 INESTIMABLE mean?

INESTIMABLE adjective
  1. Not able to be estimated; not able to be calculated, computed or comprehended, as because of great scale, degree or magnitude.

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