Crossword Genius

Concealed overdue books (6)

Ross

I believe the answer is:

latent

'concealed' is the definition.
(thesaurus)

'overdue books' is the wordplay.
'overdue' becomes 'late' ('late' can be similar in meaning to 'overdue').
'books' becomes 'nt' (New Testament).
'late'+'nt'='LATENT'

(Other definitions for latent that I've seen before include "Hidden, dormant" , "Existing but not yet active, say talent" , "waiting to be discovered" , "Unrealised, potential" , "Existing but hidden" .)

I've seen this clue in The Telegraph.
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