It's scraped out for military policemen (7)
I believe the answer is:
redcaps
'military policemen' is the definition.
The answer and definition can be both people as well as being plural nouns.
Perhaps you can see an association between them that I can't see?
'it's scraped out' is the wordplay.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'scraped' with letters rearranged gives 'REDCAPS'.
'for' acts as a link.
Can you help me to learn more?
(Another definition for redcaps that I've seen is " Military police".)