The most common and most likely answer to this crossword clue is the 3 plus 2 plus 2 letter word SAW TO IT
I've seen this crossword clue in The Guardian
S
A
W
T
O
I
T
Buddy explains!
The straight part
We know that "put an end to the job /put an end to the job" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case put an end to the job /put an end to the job = saw to it.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.