What comes before a fall (10)

I believe the answer is:

summertime

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'fall' is the definition.
The definition and answer can be both related to time as well as being singular nouns.
Perhaps there's a link between them I don't understand?

I can't explain the remainder of the clue.

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(Other definitions for summertime that I've seen before include "Gershwin song" , "when it's warm" , "Daylight-saving period" , "'Porgy and Bess' song" , "March to October, supposedly" .)

I've seen this clue in The Irish Independent.

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