The most common and most likely answer to this crossword clue is the 8 letter word FORSOOTH
I've seen this crossword clue in Independent
F
O
R
S
O
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H
More clues leading to the result FORSOOTH
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The straight part
We know that "27" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case 27 = forsooth.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 FORSOOTH mean?
FORSOOTH adverb- Used as an intensifier, often ironic: indeed, really, truthfully.