Cryptic crossword clue
Dark snake and lady of the night? 10

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

I've seen this crossword clue in The Guardian
W
I
N
D
O
W
L
E
S
S

Buddy explains!

The straight part
We know that "Dark" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case dark = windowless.
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.

Crossword Answer definitions

WINDOWLESS adjective
  1. Having no windows, especially no external windows

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