The most common and most likely answer to this crossword clue is the 10 letter word REACQUAINT
I've seen this crossword clue in The Daily Telegraph
R
E
A
C
Q
U
A
I
N
T
More clues leading to the result REACQUAINT
Buddy explains!
The straight part
We know that "Get back in touch with" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case get back in touch with = reacquaint.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 REACQUAINT mean?
REACQUAINT verb- To acquaint again; to reintroduce or refamiliarise.