Secure document found in chiropodist's (8)
I believe the answer is:
nailfile
'chiropodist's' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'secure document' is the wordplay.
'secure' becomes 'nail' (both can mean to apprehend or capture).
'document' becomes 'file' (a file is a formal document).
'nail'+'file'='NAILFILE'
'found in' is the link.
Can you help me to learn more?
(Other definitions for nailfile that I've seen before include "Manicure item" , "Manicurist's tool" .)