The most common and most likely answer to this crossword clue is the 3 plus 3 plus 7 letter word FIT FOR PURPOSE
I've seen this crossword clue in The Times
F
I
T
F
O
R
P
U
R
P
O
S
E
Buddy explains!
The straight part
We know that "Well suited to the job" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case well suited to the job = fit for purpose.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.