The most common and most likely answer to this crossword clue is the 4 letter word SLOW
I've seen this crossword clue in Financial Times
S
L
O
W
More clues leading to the result SLOW
- Dull Liberal in broadcast
- Far from Fleet Street's original base
- Dull-witted, one reportedly gin-soaked
- Beginning to seem backward in culture, behind the times
- & 23D Last and worst arrangement made by UK and US governments in response to coronavirus threat?
- Kind of 7 suggesting child-free smooch!
- Dull son’s depression
- Small and close to the ground — like a tortoise?
- Lizard that’s easy catch for early bird?
- Crawling son, small
Buddy explains!

The straight part
We know that "Kind of 7" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case kind of 7 = slow.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 SLOW mean?
SLOW noun- Someone who is slow; a sluggard.
- A slow song.
- To make (something) run, move, etc. less quickly; to reduce the speed of.
- To keep from going quickly; to hinder the progress of.
- To become slow; to slacken in speed; to decelerate.
- Taking a long time to move or go a short distance, or to perform an action; not quick in motion; proceeding at a low speed.
- Not happening in a short time; spread over a comparatively long time.
- Of reduced intellectual capacity; not quick to comprehend.
- Not hasty; not tending to hurry; acting with deliberation or caution.
- (of a clock or the like) Behind in time; indicating a time earlier than the true time.
- Lacking spirit; deficient in liveliness or briskness.
- (of a period of time) Not busy; lacking activity.
- Slowly.