Cover pieces of footage in here at intervals (7)
I believe the answer is:
eclipse
'cover pieces' is the definition.
'eclipse' can be an answer for 'cover' (thesaurus). I'm not sure about the 'pieces' bit.
'footage in here at intervals' is the wordplay.
'footage' becomes 'clips'.
'in' is an insertion indicator.
'at intervals' means one should take alternating letters (letters taken at regular intervals).
The alternate letters of 'here' are 'ee'.
'clips' placed into 'ee' is 'ECLIPSE'.
'of' is the link.
Can you help me to learn more?
(Other definitions for eclipse that I've seen before include "Solar/lunar phenomenon" , "Over-shadow as the earth may the moon" , "screen, more or less" , "Surpass, outshine" , "Obscure light from (other celestial body)" .)