Secret (4-4)
'secret' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for arcane that I've seen before include "Abstruse, mysterious" , "Mysterious, secret or obscure" , "deep" , "Secret, hidden" , "Ace ran, being mysterious" .)
'secret' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for covert that I've seen before include "Undercover, secret" , "Concealed, like fox's lair" , "Secret like fox's lair" , "Concealed - flock of coots" , "Concealed like fox's liar" .)
'secret' is the definition.
(I know that secret can be written as hidden)
This is all the clue.
(Other definitions for hidden that I've seen before include "Concealed, recondite" , "Latent" , "Consealed or secret" , "Concealed, kept secret" , "Deliberately placed out of sight and hard to find" .)
'secret' is the definition.
(I know that secret can be written as hush-hush)
This is all the clue.
(Other definitions for hush-hush that I've seen before include "Very secret in repetitive way" , "Cloak-and-dagger, secret" , "Clandestine" , "Highly secret" , "Very secret - say it twice" .)
'secret' is the definition.
(I know that secret can be written as private)
This is the entire clue.
(Other definitions for private that I've seen before include "retiring" , "Secret sort of soldier" , "Lowest rank of enlisted person" , "Small missile; tuck" , "Unofficial; military rank" .)
'secret' is the definition.
(I know that secret can be written as mystery)
This is the entire clue.
(Other definitions for mystery that I've seen before include "Something difficult to understand" , "Unexplained phenomenon" , "Puzzle" , "Religious rite - something inexplicable" , "Something that passes understanding" .)
'secret' is the definition.
(I know that secret can be written as confidential)
This is the entire clue.
(Other definitions for confidential that I've seen before include "not expecting publication" , "Intended to be kept secret" , "Graham Greene's agent" , "Inflicted on a (anag) - private" , "Classified" .)