The most common and most likely answer to this crossword clue is the 7 letter word VESTIGE
I've seen this crossword clue in The Guardian
V
E
S
T
I
G
E
More clues leading to the result VESTIGE
- Remnant of undergarment I get shortened
- Some Scouse git’s evidently up for a scrap
- From harvest I get a small amount
- Underwear I fetch is short, creating suspicion
- Drop or dump man in letter
- Underwear, I say, raised suspicion
- Undergarment I receive almost produces mark
- 2 veg — with which, regularly, meat is served up?
- Trace viewer regularly introducing Top Gear driver
- Farage stripped off underwear at the first hint
Buddy explains!

The straight part
We know that "suspicion" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case suspicion = vestige.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 VESTIGE mean?
VESTIGE noun- The mark of the foot left on the earth.
- (by extension) A faint mark or visible sign left by something which is lost, or has perished, or is no longer present.
- A vestigial organ; a non-functional organ or body part that was once functional in an evolutionary ancestor.