Follow commercial that's interrupted performance (6)
I believe the answer is:
shadow
'follow' is the definition.
(shadow can mean to follow secretly)
'commercial that's interrupted performance' is the wordplay.
I cannot really understand how this works, but
'commercial' could be 'ad' (abbreviation for advertisement) and 'ad' is located in the answer.
'performance' could be 'show' (eg a theatrical show) and 'show' is found in the leftover letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for shadow that I've seen before include "Follow - dark patch" , "Trace - dog" , "Partial or complete darkness" , "Secretly tail someone" , "Unilluminated area" .)