The most common and most likely answer to this crossword clue is the 6 letter word CAMERA
I've seen this crossword clue in The Guardian
C
A
M
E
R
A
More clues leading to the result CAMERA
- Arrived without forethought, unknown, not attracting the paparazzi?
- One snaps in the judge's room
- Approached artist for something to make a picture with
- One takes pictures secretly, in this
- Arrived ahead of artist, producer of pictures
- Church artist carrying a minute photographic device
- Snapper arrived before tailless ray
- Still producer turned up before artist
- Appeared unwise to join army in the end, not wanting to be shot
- Arrived on pitch behind gunners, wary of being shot
Buddy explains!

The straight part
We know that "this followed!" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case this followed! = camera.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 CAMERA mean?
CAMERA noun- A device for taking still or moving pictures or photographs.
- The viewpoint in a three-dimensional game or simulation.
- A vaulted room.
- The judge's private chamber, where cases may be heard in camera.