Boss one prone to social blundering? (6)
I believe the answer is:
gaffer
I believe this clue is a double definition.
'boss' is the first definition.
(I know that boss can be written as gaffer)
'one prone to social blundering?' is the second definition.
(someone making gaffes)
(Other definitions for gaffer that I've seen before include "Superior" , "Senior electrician on a film/TV set" , "blunderer" , "Foreperson of a work squad" , "An old person" .)