After baffling air raid film, turned shed light on (9)
I believe the answer is:
irradiate
'shed light on' is the definition.
(I've seen this before)
'after baffling air raid film turned' is the wordplay.
'after baffling' is an anagram indicator.
'film' becomes 'ET' (E.T. the Extra-Terrestrial).
'turned' says the letters should be written in reverse.
'et' reversed gives 'te'.
'air'+'raid'='airraid'
'airraid' is an anagram of 'irradia'.
'irradia'+'te'='IRRADIATE'
(Other definitions for irradiate that I've seen before include "Shine light on" , "Make bright" , "Shed light on" , ""One fine day" would do" .)