The most common and most likely answer to this crossword clue is the 2 plus 2 plus 3 plus 7 letter word GO TO THE COUNTRY
G
O
T
O
T
H
E
C
O
U
N
T
R
Y
More clues leading to the result GO TO THE COUNTRY
Buddy explains!
The straight part
We know that "PMs do it regularly/visit Chequers" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case pms do it regularly/visit chequers = go to the country.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.