Part of orchid denied or concealed (6)
I believe the answer is:
hidden
'concealed' is the definition.
('hidden' can be similar in meaning to 'concealed')
'part of orchid denied or' is the wordplay.
'part of' says the answer is hidden in the clue.
'HIDDEN' can be found hidden inside 'orchid denied or'.
(Other definitions for hidden that I've seen before include "Obscure" , "Consealed or secret" , "Not accessible to view" , "Concealed, kept secret" , "Deliberately placed out of sight and hard to find" .)