Crossword Genius

Son, one who blabs -- a sneaky type (7)

Ross

I believe the answer is:

stalker

'a sneaky type' is the definition.
(someone who sneaks around)

'son one who blabs' is the wordplay.
'son' becomes 's'.
'one who blabs' becomes 'talker' (someone who talks).
's'+'talker'='STALKER'

(Other definitions for stalker that I've seen before include "Stealthy pursuer" , "Obsessive follower" , "unwanted admirer?" , "One harassing celebrity" , "Person who follows another about as if hunting prey" .)

I've seen this clue in The Telegraph.
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