The most common and most likely answer to this crossword clue is the 7 letter word MEDIUMS
I've seen this crossword clue in The Daily Telegraph
M
E
D
I
U
M
S
More clues leading to the result MEDIUMS
Buddy explains!

The straight part
We know that "Late to get in touch with these people?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case late to get in touch with these people? = mediums.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 MEDIUMS mean?
MEDIUMS noun- (plural media or mediums) The chemistry of the surrounding environment, e.g. solid, liquid, gas, vacuum, or a specific substance such as a solvent.
- (plural media or mediums) The materials or empty space through which signals, waves or forces pass.
- (plural media or mediums) A format for communicating or presenting information.
- (plural media or mediums) The materials used to finish a workpiece using a mass finishing or abrasive blasting process.
- (plural media or mediums) A nutrient solution for the growth of cells in vitro.
- (plural media or mediums) The means, channel, or agency by which an aim is achieved.
- (plural mediums or media) A liquid base which carries pigment in paint.
- (plural mediums or media) A tool used for painting or drawing.
- (plural mediums) Someone who supposedly conveys information from the spirit world.
- (plural mediums) Anything having a measurement intermediate between extremes, such as a garment or container.
- (plural mediums) A person whom garments or apparel of intermediate size fit.
- (plural mediums) A half-pint serving of Guinness (or other stout in some regions).
- A middle place or degree.
- An average; sometimes the mathematical mean.
- The mean or middle term of a syllogism, that by which the extremes are brought into connection.