Crossword Genius

Record library with content written out in great detail (8)

Ross

I believe the answer is:

minutely

'in great detail' is the definition.
(with attention to minute details)

'record library with content written out' is the wordplay.
'record' becomes 'minute' (minute is a kind of record).
'with content written out' says to hollow out the word (remove centre letters).
'library' with its middle taken out is 'ly'.
'minute'+'ly'='MINUTELY'

(Another definition for minutely that I've seen is " Precisely".)

I've seen this clue in The Guardian.
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