Crossword Genius

Abstruse remedy introduced by old surgeon (7)

Ross

I believe the answer is:

obscure

'abstruse' is the definition.
('obscure' can be a synonym of 'abstruse')

'remedy introduced by old surgeon' is the wordplay.
'remedy' becomes 'cure' ('cure' can be a synonym of 'remedy').
'introduced by' says to put letters next to each other.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'surgeon' becomes 'bs'.
'o'+'bs'='obs'
'cure' put after 'obs' is 'OBSCURE'.

(Other definitions for obscure that I've seen before include "Blot out" , "Jude may be" , "Hard to make out" , "Not clear, hidden" , "Indistinct; conceal" .)

I've seen this clue in The Times.
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