The most common and most likely answer to this crossword clue is the 7 letter word DIARIST
I've seen this crossword clue in The Daily Telegraph
D
I
A
R
I
S
T
More clues leading to the result DIARIST
- Detective happens to interrupt cunning chronicler
- Recorder returning passport, noble for the most part
- Bridget Jones possibly mounted attack on one street
- One making a record in seedy joint, did we hear?
- One records attack being repulsed first
- Frank, perhaps, in frightful joint, loosely speaking?
- Recorder makes the most terrible sound
- Mole, for example, with bad joint, did you say?
- I’d upset member of the upper class, not half — I’ve put something on record
- Recorder of events as I attack, having turned up street
Buddy explains!

The straight part
We know that "I’ve put something on record" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case i’ve put something on record = diarist.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 DIARIST mean?
DIARIST noun- One who keeps a diary.