Crossword Genius

Concealed in both ideas (3)

Ross

I believe the answer is:

hid

'concealed' is the definition.
('hide' can be a synonym of 'conceal')

'in both ideas' is the wordplay.
'in' indicates a hidden word.
'HID' can be found hidden inside 'both ideas'.

(Other definitions for hid that I've seen before include "Concealed, kept secret" , "Shrouded" , "Concealed from sight" , "Kept out of sight" , "Concealed (oneself?)" .)

I've seen this clue in The Mirror.
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