The most common and most likely answer to this crossword clue is the 10 letter word SOI-DISANT
I've seen this crossword clue in The Times
S
O
I
-
D
I
S
A
N
T
More clues leading to the result SOI-DISANT
- What’s wrongly said is not pretended
- Nothing I’d found in letters of saints somehow not deserving the label?
- Unjustifiably claimed an idiot’s wrong — answers finally will get stuck in
- Financially sound but left out, is model of industry nominal?
- Reliable but losing heart — is worker, in terms of self-image?
- Self-styled Adonis is unusually tense
Buddy explains!

The straight part
We know that "pretended" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case pretended = soi-disant.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 SOI-DISANT mean?
SOI-DISANT adjective- Self-styled; self-proclaimed.
- Supposedly