Crossword Genius

Correct relative inhaling cannabis (4,2)

Ross

I believe the answer is:

spot on

'correct' is the definition.
(I've seen this before)

'relative inhaling cannabis' is the wordplay.
'relative' becomes 'son' (son is a kind of relative).
'inhaling' is an insertion indicator.
'cannabis' becomes 'pot' ('pot' can be a synonym of 'cannabis').
'son' placed around 'pot' is 'SPOT-ON'.

(Other definitions for spot on that I've seen before include "Quite right" , "Completely accurate" , "Exact" , "Excellent" , "perfect" .)

I've seen this clue in The Guardian.
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