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 answer and definition can be both related to natural events as well as being singular nouns.
Perhaps 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' enclosing 'areclips' is 'SOLAR ECLIPSE'.

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