Cryptic crossword clue
Capital ideas 10

The most common and most likely answer to this crossword clue is the 10 letter word BRAINWAVES

I've seen this crossword clue in The Guardian
B
R
A
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W
A
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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 BRAINWAVES mean?

BRAINWAVES noun
  1. Any of many rhythmic fluctuations of electric potential between parts of the brain, especially those seen on an electroencephalogram
  2. A sudden idea, understanding, or inspiration; a brainstorm

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