Cryptic crossword clue
Diminish three consecutive semitones 7

The most common and most likely answer to this crossword clue is the 7 letter word DEFLATE

I've seen this crossword clue in Financial Times
D
E
F
L
A
T
E


Buddy explains!

The straight part
We know that "Diminish" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case diminish = deflate.
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 DEFLATE mean?

DEFLATE verb
  1. To remove air or some other gas from within an elastic container, e.g. a balloon or tyre
  2. To cause an object to decrease or become smaller in some parameter, e.g. to shrink
  3. To reduce the amount of available currency or credit and thus lower prices.
  4. To become deflated.
  5. To let down or disappoint.
  6. To compress (data) according to a particular algorithm.

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