Old Boy’s remedy far from clear (7)

I believe the answer is:

obscure

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'far from clear' is the definition.
I can't tell whether this definition defines the answer.

'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'

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(Other definitions for obscure that I've seen before include "Conceal; uncertain" , "not easily understood" , "Arcane" , "Enigmatic (like Jude?)" , "Jude may be" .)

I've seen this clue in The Times.

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