Crossword Genius

Shady old boy's remedy (7)

Ross

I believe the answer is:

obscure

'shady' is the definition.
(thesaurus)

'old boy's remedy' is the wordplay.
'old boy's' becomes 'OBs' (abbreviation for a private school 'old boy').
'remedy' becomes 'cure' (synonyms).
'obs'+'cure'='OBSCURE'

(Other definitions for obscure that I've seen before include "Hazy or cryptic" , "Indistinct; conceal" , "Arcane" , "Vague - mask" , "Enigmatic (like Jude?)" .)

I've seen this clue in The Sun.
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