The most common and most likely answer to this crossword clue is the 5 plus 6 letter word TRADE SECRET
I've seen this crossword clue in The Daily Telegraph
T
R
A
D
E
S
E
C
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T
More clues leading to the result TRADE SECRET
- Deal with hidden wrinkle?
- Street cred possibly involves a hush-hush manufacturing advantage
- Setter cared to mess around? That’s none of your business!
- Market confidence?
- Inside information acquired from private customers first
- Faulty car retested possible subject of industrial espionage
- A street cred ruined? It’s not something professionals divulge
Buddy explains!
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.