Cryptic crossword clue
Queen slips out of jacket in bar, in the main 4

The most common and most likely answer to this crossword clue is the 4 letter word REEF

I've seen this crossword clue in Financial Times
R
E
E
F


Buddy explains!

The straight part
We know that "bar, in the main" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case bar, in the main = reef.
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 REEF mean?

REEF noun
  1. A chain or range of rocks, sand, or coral lying at or near the surface of the water.
  2. A large vein of auriferous quartz; hence, any body of rock yielding valuable ore.
  3. A portion of a sail rolled and tied down to lessen the area exposed in a high wind.
  4. A reef knot.
REEF verb
  1. To take in part of a sail in order to adapt the size of the sail to the force of the wind.
  2. To pull or yank strongly, especially in relation to horse riding.
  3. (of paddles) To move the floats of a paddle wheel toward its center so that they will not dip so deeply.
REEF noun
  1. The itch; any eruptive skin disorder.
  2. Dandruff.
REEF adjective
  1. Scabby; scurvy.

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