Nick computer record for digital tool (4,4)
I believe the answer is:
nail file
'digital tool' is the definition.
(nails are digits)
'nick computer record' is the wordplay.
'nick' becomes 'nail' (both can mean to apprehend or arrest).
'computer record' becomes 'file' (digital file).
'nail'+'file'='NAIL-FILE'
'for' acts as a link.
(Other definitions for nail file that I've seen before include "Manicurist item" , "Manicure tool" , "Metal strip to manicure fingers" , "Something a manicurist might use" , "Roughened metal strip for trimming horny hands" .)