The most common and most likely answer to this crossword clue is the 7 letter word TRUSSED
I've seen this crossword clue in The Daily Telegraph
T
R
U
S
S
E
D
More clues leading to the result TRUSSED
- Bound by oral confidence
- Tied up with security, we hear
- Confidence, as reported, is bound to be restrained
- One way to secure money soundly tied up
- Bound to have faith in audience
- Faith expressed in being tied up
- Reported responsibility with a support framework
- Faith said to be tied up
- Bound to display confidence in audio version
- Bound to use dusters
Buddy explains!

The straight part
We know that "tied up" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case tied up = trussed.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 TRUSSED mean?
TRUSSED verb- To tie up a bird before cooking it.
- To secure or bind with ropes.
- To support.
- To take fast hold of; to seize and hold firmly; to pounce upon.
- To strengthen or stiffen, as a beam or girder, by means of a brace or braces.
- To execute by hanging; to hang; usually with up.