Blair admitting issue with tablets for film-maker (5,6)
I believe the answer is:
orson welles
'film-maker' is the definition.
(I know that Orson Welles is a filmmaker)
'blair admitting issue with tablets' is the wordplay.
'blair' becomes 'orwell' (I've seen this before).
'admitting' is an insertion indicator (admit can mean to welcome in or accept).
'issue' becomes 'son' (issue can mean someone's offspring).
'with' is a charade indicator (letters next to each other).
'tablets' becomes 'es' (E can refer to an ecstasy tablet).
'orwell' placed around 'son' is 'orsonwell'.
'orsonwell'+'es'='ORSON WELLES'
'for' is the link.
(Other definitions for orson welles that I've seen before include "Actor" , "Colossus of the performing arts" , "Director of the film Citizen Kane" .)