The most common and most likely answer to this crossword clue is the 6 plus 4 letter word HEALTH CARE
I've seen this crossword clue in The Guardian
H
E
A
L
T
H
C
A
R
E
Buddy explains!
The straight part
We know that "NHS provision /NHS provision" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case nhs provision /nhs provision = health care.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.