Rudimentary component of telecast about men (7)
I believe the answer is:
element
'rudimentary component of telecast about men' is the definition.
I can't tell whether this defines the answer.
'component of telecast about men' is the wordplay.
'component of' is an insertion indicator.
'telecast' becomes 'tele' (I am not sure about this - if you are sure you should believe this answer much more).
'about' shows that the letters should be reversed in order.
'tele' reversed gives 'elet'.
'elet' placed around 'men' is 'ELEMENT'.
Can you help me to learn more?
(Other definitions for element that I've seen before include "Eg copper" , "For example, gold" , "Chemical building-block" , "Trace" , "Singular ingredient" .)