Secular expert's to make an impression on the radio (7)
I believe the answer is:
profane
'secular' is the definition.
(I know that secular can be written as profane)
'expert's to make an impression on the radio' is the wordplay.
I cannot really understand how this works, but
'an' could be 'a' and 'a' is present in the answer.
'expert' could be 'pro' (short for professional) and 'pro' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for profane that I've seen before include "Desecrate" , "Secular; obscene" , "Secular; blasphemous" , "Unholy" , "Impious" .)