Lighting failure only covers live bits of film (5,7)

I believe the answer is:

solar eclipse

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'lighting failure' is the definition.
The definition and answer can be both related to natural events as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'only covers live bits of film' is the wordplay.
'only' becomes 'sole' (synonyms).
'covers' is an insertion indicator.
'live' becomes 'are' ('they live' means 'they are').
'bits of film' becomes 'clips' (film clips).
'are'+'clips'='areclips'
'sole' placed around 'areclips' is 'SOLAR ECLIPSE'.

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