Cryptic crossword clue
Drunken duke on floor is not expected 8-3

The most common and most likely answer to this crossword clue is the 12 letter word UNLOOKED-FOR

I've seen this crossword clue in The Times
U
N
L
O
O
K
E
D
-
F
O
R

Buddy explains!

The straight part
We know that "not expected" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case not expected = unlooked-for.
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 UNLOOKED-FOR mean?

UNLOOKED-FOR adjective
  1. Not expected or anticipated; unforeseen.
  2. Not looked for, not searched for.

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