Logic concerning a boy (6)

I believe the answer is:

reason

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

'concerning a boy' is the wordplay.
'concerning' becomes 're' (both can mean on a particular topic).
'boy' becomes 'son' (synonyms).
're'+'a'+'son'='REASON'

(Other definitions for reason that I've seen before include "logical argument" , "Defence" , "Cause or motive" , "Logic, sense" , "Explanation or justification" .)

I've seen this clue in The Irish Independent.

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