A clue would be anything that indicates some fact about a subject of interest.
In a detective story anything could be a clue, as they are usually disguised as something else in order not to appear too obvious.
eg.
Hastings: Well Poiriot we can discount Madam Summers as a suspect. She was performing with the London National Orchestra on the night of the murder in front of eight hundred people.
Poirot: Performing? How Performing?
Hastings: The Emperor Concerto.
Poirot: Mon Deiu, Hastings! I said how not what. What did she perform? What did she do to perform this performance that eight hundred citizens of London observeded?
Hastings: Well I would think that she played the Piano of course. The Emperor Concerto's a piano concerto isn't it?
Poirot: The piano! Madam Summers plays the piano? Hastings (oh hastings) have you not observeded that Madam Summers has no fingers on her right hand? Would that not serve as a clue that Madam Summers could not play something as complex as the Emperor Concerto on the piano?
Hastings: Oh right.
Poirot: No, if Madame Summers played in the orchestra at all she was in the string section - or perhaps percussion.
A detective could find a clue on a cloth by the sme
The word clue is a noun, as in, the detective was looking for a clue. It is used in an idiomatic way as a verb, as in, I would like somebody to clue me in.
The detective tried to decipher the clue.
Detective Story Magazine ended in 1949.
Detective Story Magazine was created in 1915.
A Double Barrelled Detective Story was created in 1902.
A sleuth is a detective who follows a clue or a sleuth-hound that follows a scent.
Picturing a detective looking at a clue through a magnifying glass is a good way to remember the meaning of the word scrutinize.
because he was a detective person
Edgar Allan Poe was given credit for inventing the detective story.
A Double Barrelled Detective Story has 179 pages.
First you do some research and learn what a detective does. Then just imagine your detective doing his or her job and write what would happen in your story.