The most common and most likely answer to this crossword clue is the 5 plus 4 letter word X-RAY UNIT
X
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R
A
Y
U
N
I
T
Buddy explains!
The straight part
We know that "broken bones a routine feature of this" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case broken bones a routine feature of this = x-ray unit.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.