Film regularly aired introduced by short sharp blasts (7)
I believe the answer is:
tootsie
'film' is the definition.
(1982 film)
'regularly aired introduced by short sharp blasts' is the wordplay.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
'introduced by' means one lot of letters go next to another.
'short sharp blasts' becomes 'toots' (as in toots on an instrument).
The alternate letters of 'aired' are 'ie'.
'ie' after 'toots' is 'TOOTSIE'.
(Other definitions for tootsie that I've seen before include "A child's foot?" , "Part of foot" , "digit" , "Child's word for toe" , "Film with Dustin Hoffman" .)