Cryptic crossword clue
Part of bound ream that is not thought of 8

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

I've seen this crossword clue in The Times
U
N
D
R
E
A
M
T

Buddy explains!

The straight part
We know that "not thought of" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case not thought of = undreamt.
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 UNDREAMT mean?

UNDREAMT adjective
  1. Not dreamed; not dreamt.

Latest crossword clues with full explanations