Cryptic crossword clue
Gets dirty book and relaxes, missing out intro 8

The most common and most likely answer to this crossword clue is the 8 letter word BLACKENS

I've seen this crossword clue in The Daily Telegraph
B
L
A
C
K
E
N
S

Buddy explains!

The straight part
We know that "Gets dirty" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case gets dirty = blackens.
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 BLACKENS mean?

BLACKENS verb
  1. (causative) To cause to be or become black.
  2. To become black.
  3. (causative) To make dirty.
  4. To defame or sully.
  5. To cook (meat or fish) by coating with pepper, etc., and quickly searing in a hot pan.

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